Guest
Real Opcodes
- AAC: Alter All Commands
- AAD: Alter All Data
- AAO: Add And Overflow
- AAR: Alter At Random
- AB: Add Backwards
- ABC: AlphaBetize Code
- ABR: Add Beyond Range
- ACC: Advance CPU Clock
- ACDC: Allow Controller to Delete Contents
- ACDP: Allow Controller to Die Peacefully
- ACQT: Advance Clock to Quitting Time
- ADB: Another Dumb Bug
- AEE: Absolve Engineering Errors
- AFF: Add Fudge Factor
- AFHB: Align Fullword on Halfword Boundary
- AFP: Abnormalize Floating Point
- AFR: Abort Funny Routine
- AFVC: Add Finagle's Variable Constant
- AGB: Add GarBage
- AGWA: Add and Get Wrong Answer
- AI: Add Improper
- AIB: Attack Innocent Bystander
- AIB: Attack Innocent Bystanders
- AISG: Access and Improve Student Grade
- AMM: Add Mayo and Mustard
- AMM: Answer My Mail
- AMS: Add Memory to System
- ANC: ANnoy Consultant
- AOI: Annoy Operator Immediate
- AR: Advance Rudely
- AR: Alter Reality
- ARN: Add and Reset to Non-zero
- ARN: Add and Reset to Nonzero
- ARZ: Add and Reset to Zero
- AS: Add Sideways
- ASQGSA: ASCII Stupid Question, Get a Stupid ANSI
- AT: Accumulate Trivia
- AWP: Argue With Programmer
- AWTT: Assemble With Tinker Toys
- BA: Branch Anywhere
- BAC: Branch to Alpha Centauri
- BAD: Branch And Die
- BAD: Branch to Auto Destruct
- BAF: Blow All Fuses
- BAH: Branch And Hang
- BALC: Branch And Link Cheeseburger
- BAP: Branch And Punt
- BAW: Bells And Whistles
- BB: Branch on Bug
- BBBB: Byte Baudy Bit and Branch
- BBBF: Branch on Bit Bucket Full
- BBD: Branch on Bastille Day
- BBI: Branch on Burned-out Indicator
- BBIL: Branch on Burned-out Indicator Light
- BBLB: Branch on Blinking Light Bulb
- BBT: Branch on Binary Tree
- BBW: Branch Both Ways
- BCB: Burp and Clear Bytes
- BCF: Branch on Chip box Full
- BCIL: Branch Creating Infinite Loop
- BCR: Backspace Card Reader
- BCS: Branch and Crash System
- BCU: Be Cruel and Unusual
- BD: Backspace Disk
- BD: Branch to Data
- BDC: Break Down and Cry
- BDI: Branch to Data Indirect
- BDM: Branch and Disconnect Memory
- BDT: Burn Data Tree
- BDU: Branch on Dense User
- BE: Branch Everywhere
- BEW: Branch Either Way
- BF: Belch Fire
- BF: Blow Fuse
- BF: Branch Forever
- BFD: Branch on Full Disk
- BFF: Branch and Form Feed
- BFM: Be Fruitful and Multiply
- BH: Branch and Hang
- BIR: Branch Inside Ranch
- BIRM: Branch on Index Register Missing
- BLC: Branch and Loop Continuous
- BLI: Branch and Loop Infinite
- BLM: Branch, Like, Maybe
- BLMWM: Branch, Like, Maybe, Wow, Man
- BLP: Boot from Line Printer
- BLR: Branch and Lose Return
- BLSH: Buy Low, Sell High
- BLT: Break Little Thing
- BM: Branch Maybe
- BMI: Blow up Memory Immediate
- BMI: Branch on Missing Index
- BMI: Branch to Muncee Immediate
- BMP: Branch and Make Popcorn
- BMR: Branch Multiple Registers
- BMUS: Beam Me Up, Scotty
- BNA: Branch to Nonexistant Address
- BNCB: Branch and Never Come Back
- BNL: Become a Neo-Luddite
- BNR: Branch for No Reason
- BOB: Branch On Bug
- BOD: Beat On Disk
- BOD: Branch on Operator Desperate
- BOH: Branch On Humidity
- BOH: Branch on Operator High
- BOHP: Bribe Operator for Higher Priority
- BOI: Byte Operator Immediately
- BOP: Boot OPerator
- BOT: Branch On Tree
- BPB: Branch on Program Bug
- BPDI: Be Polite, Don't Interrupt
- BPIM: Bury Programmer In Manuals
- BPL: Branch PLease
- BPM: Become a Psych Major
- BPO: Branch on Power Off
- BPO: Branch on Power On
- BPP: Branch and Pull the Plug
- BR: Byte and Run
- BRA: Branch to Random Address
- BRB: BRanch on Beaver
- BRH: BRanch and Hang
- BRI: BRanch Indefinitely
- BRL: BRanch and Leak
- BRO: BRanch and Overheat
- BRO: BRanch to Oblivion
- BS: Behave Strangely
- BSC: Branch on Second Coming
- BSC: Burst Selector Channel
- BSD: BackSpace Disk
- BSI: Back up Sewer Immediate
- BSI: Backup Sewer Immediately
- BSM: Branch and Scramble Memory
- BSO: Branch on Sleepy Operator
- BSP: BackSpace Punch
- BSR: Branch and Stomp Registers
- BSS: Branch on SunSpot
- BSST: BackSpace and Stretch Tape
- BTD: Branch on Time of Day
- BTD: Byte The Dust
- BTI: Blow Trumpet Immediately
- BTJ: Branch and Turn Japanese
- BTO: Branch To Oblivion
- BTW: Branch on Third Wednesday
- BU: Branch Unexpectedly
- BUTI: Blow Up Terminal Immediately
- BVS: Branch and Veer South
- BW: Branch on Whim
- BWC: Branch When Convenient
- BWF: Busy, Wait Forever
- BWOP: BeWilder OPerator
- BYDS: Beware Your Dark Side
- BYTE: BYte TEst
- CAC: Calling All Cars
- CAC: Cash And Carry
- CAF: Convert ASCII to Farsii
- CAI: Corrupt Accounting Information
- CAIL: Crash After I Leave
- CAR: Cancel Accounts Receivable
- CAT: Confused And Tired
- CB: Consult Bozo
- CBA: Compare and Branch Anyway
- CBBR: Crash and Blow Boot Read-only memory
- CBNC: Close, But No Cigar
- CBS: Clobber BootStrap
- CC: Call Calvery
- CC: Compliment Core
- CCB: Chocolate Chip Byte-mode
- CCB: Consult Crystal Ball
- CCC: Crash if Carry Clear
- CCCP: Conditionally Corrupt Current Process
- CCD: Choke Cough and Die
- CCD: Clear Core and Dump
- CCR: Change Channels at Random
- CCS: Chinese Character Set
- CCWR: Change Color of Write Ring
- CD: Complement Disk
- CDC: Clear Disk and Crash
- CDC: Close Disk Cover
- CDIOOAZ: Calm Down, It's Only Ones And Zeroes
- CDS: Change Disk Speed
- CEMU: Close Eyes and Monkey with User space
- CEX: Call EXterminator
- CF: Come From [replaces goto]
- CFE: Call Field Engineer
- CFP: Change and Forget Password
- CFS: Corrupt File Structure
- CG: Convert to Garbage
- CH: Create Havoc
- CHCJ: Compare Haig to Christine Jorgensen
- CHPAMR: CHase Pointers Around Machine Room
- CHSE: Compare Half-words and Swap if Equal
- CIB: Change Important Byte
- CIC: Cash In Chips
- CID: Compare and Ignore Data
- CIMM: Create Imaginary Memory Map
- CIZ: Clear If Zero
- CLBR: CLoBber Register
- CLBRI: CLoBber Register Immediate
- CM: Circulate Memory
- CMD: CPU Melt Down
- CMD: Compare Meaningless Data
- CMI: Clobber Monitor Immediate
- CML: Compute Meaning of Life
- CMP: Create Memory Prosthesis
- CMS: Click MicroSwitch
- CN: Compare Nonsensically
- CNB: Cause Nervous Breakdown
- CNS: Call Nonexistent Subroutine
- COCS: Copy Object Code to Source
- COD: Crash On Demand
- COLB: Crash for Operator's Lunch Break
- COM: Clear Operator's Mind
- COMF: COMe From
- CON: Call Operator Now
- COS: Copy Object code to Source file
- COWYHU: Come Out With Your Hands Up
- CP: Compliment Programmer
- CP%FKM: CPU — FlaKeout Mode
- CP%WM: CPU — Weird Mode
- CPB: Create Program Bug
- CPN: Call Programmer Names
- CPPR: Crumple Printer Paper and Rip
- CRASH: Continue Running After Stop or Halt
- CRB: CRash and Burn
- CRD: Confirm Rumor by Denial
- CRM: CReate Memory
- CRM: Clear Random Memory
- CRN: Compare with Random Number
- CRN: Convert to Roman Numerals
- CRYPT: reCuRsive encrYPt Tape
- CS: Crash System
- CSL: Curse and Swear Loudly
- CSN: Call Supervisor Names
- CSNIO: Crash System on Next I/O
- CSS: Crash Subsidiary Systems
- CSU: Call Self Unconditional
- CTDMR: Change Tape Density, Mid Record
- CTT: Call Time and Temperature
- CU: Convert to Unary
- CUC: Cheat Until Caught
- CVFL: ConVert Floating to Logical
- CVFP: ConVert Fortran to Pascal
- CVG: ConVert to Garbage
- CVU: ConVert to Unary
- CWAH: Create Woman And Hold
- CWB: Carry With Borrow
- CWDC: Cut Wires and Drop Core
- CWG: Chase Wild Goose
- CWGK: Compare Watt to Genghis Khan
- CWIT: Compare Watt to Ivan the Terrible
- CWM: Compare Watt to Mussolini
- CWOM: Complement Write-Only Memory
- CZZC: Convert Zone to Zip Code
- DA: Develop Amnesia
- DAB: Delete All Bugs
- DAC: Divide And Conquer
- DAD: Destroy A-Disk
- DAO: Divide And Overflow
- DAP: De-select Active Peripheral
- DAUF: Delete All Useless Files
- DB: Drop Bits
- DBL: Desegregate Bus Lines
- DBR: DeBase Register
- DBTP: Drop Back Ten and Punt
- DBZ: Divide By Zero
- DC: Degauss Core
- DC: Divide and Conquer
- DCAD: Dump Core And Die
- DCD: Drop Cards Double
- DCGC: Dump Confusing Garbage to Console
- DCI: Disk Crash Immediate
- DCON: Disable CONsle
- DCR: Double-precision CRash
- DCT: Drop Cards Triple
- DD: Destroy Disk
- DD: Drop Disk
- DDC: Dally During Calculations
- DDOA: Drop Dead On Answer
- DDS: Delaminate Disk Surface
- DDT: Debug Program
- DDWB: Deposit Directly in Waste Basket
- DEB: Disk Eject Both
- DEC: Decompile Executable Code
- DEI: Disk Eject Immediate
- DEM: Disk Eject Memory
- DFA: Disable FAns
- DGO: Decrement the Grades of Others
- DGT: Dispense Gin and Tonic
- DHTPL: Disk Head Three Point Landing
- DIA: Develop Ineffective Address
- DICE: Delete Invalid Customer Engineer
- DIE: DIsable Everything
- DIF: DIsable Fuses
- DIG: DIsable Gravity
- DIH: Disable Interrupts and Hang
- DIRFO: Do It Right For Once
- DISC: DISmount CPU
- DK: Destroy Klingons
- DKP: Disavow Knowledge of Programmer
- DLN: Don't Look Now
- DLP: Drain Literal Pool
- DMAG: Do MAGic
- DMNS: Do what i Mean, Not what i Say
- DMP: Destroy Memory Protect key
- DMPE: Decide to Major in Phys. Ed.
- DMPK: Destroy Memory Protect Key
- DMZ: Divide Memory by Zero
- DND: Destroy Neighbor's Data
- DNPG: Do Not Pass Go
- DO: Divide and Overflow
- DO: Divide and Overflow [IBM PC]
- DOC: Drive Operator Crazy
- DOV: Divide and OVerflow
- DP: Destroy Peripherals
- DPC: Decrement Program Counter
- DPCS: Decrement Program Counter Secretly
- DPK: Destroy storage Protect Key
- DPMI: Declare Programmer Mentally Incompetent
- DPN: Double Precision No-op
- DPR: Destroy PRogram
- DPS: Disable Power Supply
- DR: Detach Root
- DRAF: DRAw Flowchart
- DRAM: Decrement RAM
- DRBA: Deposit Round-off in my Bank Account
- DRD: DRop Dead
- DRI: Disable Random Interrupt
- DROM: Destroy ROM
- DRT: Disconnect Random Terminal
- DS: Deadlock System
- DSD: Dismount System Disk
- DSI: Do Something Interesting
- DSO: Disable System Operator
- DSP: Degrade System Performance
- DSR: Detonate Status Register
- DSTD: Do Something Totally Different
- DSUIT: Do Something Utterly, Indescribably Terrible
- DT%FFP: DecTape — unload and Flappa FlaP
- DT%SHO: DecTape — Spin Hubs Opposite
- DTB: Destructively Test Bit
- DTC: Destroy This Command
- DTE: Decrement Telephone Extension
- DTI: Do The Impossible
- DTRT: Do The Right Thing
- DTVFL: Destroy Third Variable From Left
- DU: Dump User
- DUD: Do Until Dead
- DW: Destroy World
- DWIM: Do What I Mean
- DWIT: Do What I'm Thinking
- DWIW: Do What I Want
- EA: Enable Anything
- EAC: Emulate Acoustic Coupler
- EAL: Enable AC to Logic rack
- EAO: Enable AC to Operator
- EBB: Edit and Blank Buffer
- EBB: Empty Bit Bucket
- EBR: Erase Before Reading
- EBRS: Emit Burnt Resistor Smell
- EC: Eat Card
- ECF: Explode and Catch Fire
- ECL: Early Care Lace
- ECO: Electrocute Computer Operator
- ECP: Erase Card Punch
- ED: Eject Disk
- ED: Execute Data
- EDD: Eat Disk and Die
- EDIT: Erase Data and Increment Time
- EDP: Emulate Debugged Program
- EDR: Emit Deadly Radiation
- EDR: Execute Destructive Read
- EDS: Execute Data Segment
- EEOIFNO: Execute Every Other Instruction From Now On
- EEP: Erase Entire Program
- EFB: Emulate Five-volt Battery
- EFD: Eject Floppy Disk
- EFD: Emulate Frisbee using Disk pack
- EFE: Emulate Fatal Error
- EHC: Emulate Headless Chicken
- EIA: Elvis Is Alive
- EIAO: Execute In Any Order
- EIO: Erase I/O page
- EIO: Execute Invalid Op-code
- EIO: Execute Invalid Opcode
- EIOC: Execute Invalid Op-Code
- EJD: EJect Disk
- EJD%V: EJect Disk — with initial velocity V
- ELP: Enter Loop Permenantly
- EM: EMulate 407
- EM: Evacuate Memory
- EMIF: Erase Most Important File
- EMM: Emulate More Memory
- EMPC: EMulate Pocket Calculator
- EMSE: Edit and Mark Something Else
- EMSL: Entire Memory Shift Left
- EMT: Electrocute Maintenance Technician
- EMW: Emulate Maytag Washer
- ENA: ENable Anything
- ENE: ENable Everything
- END: Erase Neighbor's Data
- ENF: Emit Noxious Fumes
- ENG: ENable Gravity
- ENO: Emulate No-Op
- EO: Electrocute Operator
- EOB: Execute Operator and Branch
- EOI: Explode On Interrupt
- EOS: Erase Operating System
- EP: Execute Programmer
- EPD: Explode Peripheral Device
- EPI: Execute Programmer Immediate
- EPITS: Execute Previous Instruction Then Skip
- EPL: Emulate Phone Line
- EPP: Eject Printer Paper
- EPS: Electrostatic Print and Smear
- EPS: Execute Program Sideways
- EPSW: Execute Program Status Word
- EPT: Erase Process Table
- EPT: Erase Punched Tape
- ERIC: Eject Random Integrated Circuit
- ERM: Erase Reserved Memory
- EROM: Erase Read-Only Memory
- EROS: Erase Read-Only Storage
- EROS: Erase Read-Only Storage [Everex int]
- ERS: Erase Read-only Storage
- ESB: Eject Selectric Ball
- ESC: Emulate System Crash
- ESD: Eject Spinning Dish
- ESL: Exceed Speed of Light
- ESP: Enable SPrinkler system
- ETI: Execute This Instruction
- ETM: Emulate Trinary Machine
- ETPH: E. T. Phone Home
- EVC: Execute Verbal Commands
- EWD: Enter Warp Drive
- EWM: Enter Whimsy Mode
- EXB: EXcrement and Branch
- EXE: EXecute Engineer
- EXI: EXecute Invalid operation
- EXO: EXecute Operator
- EXOP: EXecute OPerator
- EXP: EXecute Programmer
- EXPP: EXecute Political Prisoner
- FAY: Fetch Amulet of Yendor
- FB: Find Bugs
- FC: Fry Console
- FCJ: Feed Card and Jam
- FCJ: Feed Cards and Jam
- FD: Forget Data
- FDR: Feed Disk Randomly
- FERA: Forms Eject and Run Away
- FFF: Form Feed Forever
- FLD: FLing Disk
- FLI: Flash Lights Impressively
- FM: Forget Memory
- FMP: Finish My Program
- FOPC: False Out-of-Paper Condition
- FPC: Feed Paper Continuously
- FPT: Fire Photon Torpedoes
- FRG: Fill with Random Garbage
- FRS: Fetch Ring of Sauron
- FS: Feign Sleep
- FSM: Fold, Spindle, and Mutilate
- FSR: Form Skip and Runaway
- FSRA: Forms Skip and Run Away
- FYBR: Follow Yellow Brick Road
- GAP: Grade All Projects
- GBB: Go to Back of Bus
- GCAR: Get Correct Answer Regardless
- GCR: Generate Confusing Results
- GDP: Grin Defiantly at Programmer
- GDR: Grab Degree and Run
- GENT: GENerate Thesis
- GEW{JO}: Go to the End of the World {Jump Off}
- GFD: Go Forth and Divide
- GFM: Go Forth and Multiply
- GIE: Generate Irreversible Error
- GL: Get Lost
- GLC: Generate Lewd Comment
- GMC: Generate Machine Check
- GMCC: Generate Machine Check and Cash
- GND: Guess at Next Digit
- GORS: GO Real Slow
- GPCR: Generate Petty Cache Request
- GR: Get Real
- GREM: Generate Random Error Message
- GREP: Global Ruin, Expiration, and Purgation
- GRMC: Generate Rubber Machine Check
- GS: Get Strange
- GSB: Gulp and Store Bytes
- GSI: Generate Spurious Interrupts
- GSU: Geometric Shift Up
- GTJ: Go To Jail
- HAC: Hold All Calls
- HACF: Halt And Catch Fire
- HAH: Halt And Hang
- HBW: Hang Bus and Wait
- HCF: Halt and Catch Fire
- HCP: Hide Central Processor
- HCRS: Hang in CRitical Section
- HDH: Hi Dee Ho
- HDO: Halt and Disable Operator
- HDRW: Halt and Display Random Word
- HELP: Hinder Everyone with Little Productivity
- HELP: Type 'No Help Available'
- HEO: Halt and Execute Operator
- HF: Hide File
- HGD: Halt, Get Drunk
- HHB: Halt and Hang Bus
- HIS: Halt in Imposible State
- HOO: Hide Operator's Output
- HRPR: Hang up and Ruin Printer Ribbon
- HSC: Halt on System Crash
- HSJ: Halt, Skip and Jump
- HTC: Halt and Toss Cookies
- HTS: Halt and Throw Sparks
- HUAL: Halt Until After Lunch
- HUP: Hang Up Phone
- HWP: Halt Without Provocation
- IA: Illocical And
- IAE: Ignore All Exceptions
- IAI: Inquire And Ignore
- IAND: Illogical AND
- IAR: Ignore All Requests
- IB: Insert Bug
- IBM: Increment and Branch to Muncee
- IBP: Insert Bug and Proceed
- IBR: Insert Bugs at Random
- ICB: Interrupt, Crash and Burn
- ICM: Immerse Central Memory
- ICMD: Initiate Core Melt Down
- ICR: Incur Costly Repair [Sun Tempest]
- ICSP: Invert Crt Screen Picture
- IDC: Initiate Destruct Command
- IDI: Invoke Divine Intervention
- IDNOP: InDirect No-OP
- IDPS: Ignore Disk Protect Switch
- IEOF: Ignore End Of File
- IF: Invoke Force
- IGI: Increment Grade Immediate
- IGIT: Increment Grade Immediate Twice
- IGO: Increment Grade Overnight
- IHC: Initiate Head Crash
- IHTFP: Increment Hormones, Test For Puberty
- II: Inquire and Ignore
- IIB: Ignore Inquiry and Branch
- IIC: Insert Invisible Characters
- IIL: Irreversable Infinite Loop
- IM: Imagine Memory
- IMBP: Insert Mistake and Blame Programmer
- IMP: Imitate Monty Python
- IMPG: IMPress Girlfriend
- IMV: IMpress Visitors
- INCAM: INCrement Arbitrary Memory
- ING: INquire and iGnore
- INI: Ignore Next Instruction
- INOP: Indirect No-OP
- INR: INstigate Rumor
- INW: INvalidate Warranty
- IOI: Ignore Operator's Instruction
- IOR: Illogical OR
- IOS: Ignore Operating System
- IP: Increment and Pray
- IPI: Ignore Previous Instruction
- IPM: Ignore Programmer's Mistakes
- IPOP: Interrupt Processor, Order Pizza
- IPS: Incinerate Power Supply
- IPS: Increment Power Supply
- IPT: Ignite Paper Tape
- IRB: Invert Record and Branch
- IRBI: Insert Random Bits Indexed
- IRC: Insert Random Commands
- IRE: Insert Random Errors
- IRI: Ignore Rude Interrupts
- IRPF: Infinite Recursive Page Fault
- ISC: Ignore Supervisor Calls
- ISC: Ignore System Crash
- ISC: Insert Sarcastic Comments
- ISI: Increment and Skip on Inifinity
- ISP: Increment and Skip on Pi
- ISTK: Invert STacK
- ITML: Initiate Termites into Macro Library
- IU: Ignore User[s]
- IXOR: Illogical eXclusive OR
- IZ: Ignore Zeroes
- JAA: Jump Almost Always
- JBS: Jump and Blow Stack
- JCI: Jump to Current Instruction
- JFM: Jump on Full Moon
- JHRB: Jump to H&R Block
- JLP: Jump and Lose Pointer
- JLR: Jump and Lose Return
- JMAT: JuMp on Alternate Thursdays
- JN: Jump to Nowhere
- JNL: Jump when programmer is Not Looking
- JOB: Jump On Beaver
- JOM: Jump Out of Memory
- JOM: Jump Over Moon
- JOP: Jump OPerator
- JPA: Jump when Pizza Arrives
- JRAN: Jump RANdom
- JRCF: Jump Relative and Catch Fire
- JRGA: Jump Relative and Get Arrested
- JRL: Jump to Random Location
- JRSR: Jump to Random SubRoutine
- JSC: Jump on System Crash
- JSOR: Jump Somewhere Over Rainbow
- JSU: Jump Self Unconditional
- JT: Jump if Tuesday
- JTT: Jump and Tangle Tape
- JTZ: Jump to Twilight Zone
- JWN: Jump When Necessary
- KCE: Kill Consultant on Error
- KCE: Kill repairman [CE]
- KDO: Knock Disk Over
- KEPITU: Kill Every Process In The Universe
- KOP: Kill OPerator
- KP: Krunch Paper
- KPR: Kill PRogrammer
- KSR: Keyboard Shift Right
- KUD: Kill User's Data
- KWWE: Kill Wicked Witch of East
- KWWW: Kill Wicked Witch of West
- LAC: Lose All Communication
- LAGW: Load And Go Wrong
- LAP: Laugh At Program
- LAP: Laugh At Programmer
- LCC: Load and Clear Core
- LCD: Launch Cartridge Disk
- LCK: Lock Console Keyswitch
- LEB: Link Edit Backwards
- LIA: Load Ineffective Address
- LMB: Lose Message and Branch
- LMO: Load and Mug Operator
- LMYB: Logical MaYBe
- LN: Lose inode Number
- LNP: Load N digits of Pi
- LOSM: Log Off System Manager
- LP%PAS: Line Printer — Print And Smear
- LP%RDD: Line Printer — Reverse Drum Direction
- LP%TCR: Line Printer — Tangle and Chew Ribbon
- LPA: Lead Programmer Astray
- LPRTC: Load Program counter from Real Time Clock
- LR: Load Revolver
- LRA: Load RetroActively
- LRB: Lose Record and Branch
- LRD: Load Random Data
- LSPSW: Load and Scramble PSW
- LTS: Link To Sputnik
- LTS: Loop Till Smokes
- LUM: LUbricate Memory
- LWE: Load WhatEver
- LWM: Load Write-only Memory
- MAB: Melt Address Bus
- MAN: Make Animal Noises
- MAZ: Multiply Answer by Zero
- MBC: Make Batch Confetti
- MBF: Multiply and Be Fruitful
- MBH: Memory Bank Hold-up
- MBTD: Mount Beatles on Tape Drive
- MBTOL: Move Bug To Operator's Lunch
- MC: Move Continuous
- MD: Move Devious
- MDB: Move and Drop Bits
- MDC: Make Disk Crash
- MDDHAF: Make Disk Drive Hop Across Floor
- MFO: Mount Female Operator
- MILI: Move It or Lose It
- MLB: Memory Left shift and Branch
- MLP: Make Lousy Program
- MLP: Multiply and Lose Precision
- MLR: Move and Lose Record
- MMF: Melt Main Frame
- MMLG: Make Me Look Good
- MNI: Misread Next Instruction
- MOG: Make Operator Growl
- MOP: Modify Operator's Personality
- MPLP: Make Pretty Light Pattern
- MRZ: Make Random Zap
- MSGD: Make Screen Go Dim
- MSP: Mistake Sign for Parity
- MSPI: Make Sure Plugged In
- MSR: Melt Special Register
- MST: Mount Scotch Tape
- MTE: Mangle Tape on Exit
- MTI: Make Tape Invalid
- MUG: Make Ugly Graphics
- MUM: Multi-Use Mnemonics
- MW: Malfunction Whenever
- MW: Multiply Work
- MWC: Move and Wrap Core
- MWT: Malfunction Without Telling
- NBC: Negate By Clearing
- NCW: Notch Carriage and Way
- NMI: Negate Most Integers
- NOP: Needlessly Omit Pointer
- NPC: Normalize Program Counter
- NPN: No Program Necessary [VAX]
- NTGH: Not Tonight, i've Got a Headache
- OBB: Overflow Bit Bucket
- OCF: Open Circular File
- OMC: Obscene Message to Console
- OMC: Overheat Memory Chip
- OML: Obey Murphy's Laws
- OPI: Order Pizza Immediately
- OPP: Order Pizza for Programmer
- OSI: Overflow Stack Immediate
- OSI: Overflow Stack Indefinite
- OSP: Open Six-Pack
- OTL: Out To Lunch
- OU: Offend User
- P$*!: Punch Obscenity
- PA: Punch in ASCII
- PAL: Pack And Leave
- PAS: Print And Smear
- PAUD: PAUse Dramatically
- PAZ: Pack Alpha Zone
- PAZ: Pack Alpha and drop Zones
- PBC: Print and Break Chain
- PBD: Print and Break Drum
- PBL: Pack Bags and Leave
- PBM: Pop Bubble Memory
- PBPBPBP: Place Backup in Plain Brown Paper Bag Please
- PBST: Play Batch mode Star Trek
- PCB: Pause for Coffee Break
- PCD: PunCh Disk
- PCI: Pleat Cards Immediate
- PCR: Print and Cut Ribbon
- PCS: Push to Centre of Stack
- PD: Play Dead
- PD: Punch Disk
- PDLD: Power Down and Lock Door [to computer room]
- PDSK: Punch DiSK
- PEHC: Punch Extra Holes in Cards
- PEP: Print on Edge of Paper
- PFD: Punt on Fourth Down
- PFE: Print Floating Eye
- PFML: Print Four Million Lines
- PG: Print Garbage
- PHO: Pull Hair Out
- PI: Punch Invalid
- PIBM: Pretend to be an IBM
- PIC: Print Illegible Characters
- PIC: Print Invalid Character
- PIC: Punch Invalid Character
- PLSC: Perform Light Show on Console
- PNIH: Place Needle In Haystack
- PNRP: Print Nasty Replies to Programmer
- PO: Punch Operator
- POCL: Punch Out Console Lights
- POG: Print Only Greek
- POP: Pop Or Push
- POPI: Punch OPerator Immediate
- POPN: Punch OPerator's Nose
- PPA: Print Paper Airplanes
- PPC: Purge Pascal Compiler [HP 3000]
- PPL: Perform Perpetual Loop
- PPP: Print Programmer's Picture
- PPR: Play Punk Rock
- PPSW: Pack Program Status Word
- PPSW: Pack Progran Status Word
- PRS: PRint and Smear
- PSP: Print and Shred Paper
- PSR: Print and Shred Ribbon
- PTP: Produce Toilet Paper
- PUO: Perform Unknown Operation
- PVLC: Punch Variable Length Card
- PWP: Print Without Paper
- PWS: create PoWer Surge
- PYS: Program YourSelf
- QBDH: Quit and Become a DeadHead
- QWYA: Quit While Your Ahead
- RA: Randomize Answer
- RAM: Randomly Access Memory
- RAM: Read Ambiguous Memory
- RAN: RANdom opcode [similar to 16-bit what gate]
- RASC: Read And Shred Card
- RAST: Read And Shred Tape
- RAU: Ridicule All Users
- RBAO: Ring Bell and Annoy Operator
- RBLY: Restore Back-up from Last Year
- RBT: Read Blank Tape
- RBT: Rewind and Break Tape
- RC: Rewind Core
- RCAJ: Read Card And Jam
- RCB: Read Command Backwards
- RCB: Run Clock Backwards
- RCC: Read Card and Chew
- RCCP: Randomly Corrupt Current Process
- RCF: Rewind Cabinet Fans
- RCKG: Read Count Key and Garbage
- RCL: Rotate Carry Left
- RCP: Reschedule Car Payments
- RCR: Rewind Card Reader
- RCRV: Randomly Convert to Reverse Video
- RCS: Read Card and Scramble data
- RCSD: Read Card and Scramble Data
- RD: Randomize Data
- RD: Reverse Directions
- RDA: Refuse to Disclose Answer
- RDB: Replace Database with Blanks
- RDB: Run Disk Backwards
- RDD: Reverse Disk Drive
- RDDBF: Rock Disk Drive Back and Forth
- RDEB: Read and Drop Even number of Bits
- RDF: Randomize Directory Filenames
- RDI: Reverse Drum Immediate
- RDI: Reverse Drun Immediate
- RDI: Rewind Disk Immediate
- RDR: Reverse Disk Rotation
- RDS: ReaD Sideways
- RENVR: REName Variables Randomly
- RET: Read and Erase Tape
- RF: Read Fingerprints
- RG: Record Garbage
- RHNEZ: Randomize and Halt if Not Equal to Zero
- RHO: Randomize and Hold all Output
- RIC: Rotate Illogical thru Carry
- RID: Read Invalid Data
- RIG: Read Inter-record Gap
- RIOP: Rotate I/O Ports
- RIR: Read Invalid Record
- RIRG: Read Inter-Record Gap
- RJE: Return Jump and Explode
- RLC: Relocate and Lose Core
- RLC: Reread Last Card
- RLC: Rotate Left with Carolyn
- RLI: Rotate Left Indefinitely
- RLP: Refill Light Pen
- RLP: Rewind Line Printer
- RM: Ruin My files
- RMI: Randomize Memory Immediate
- RMM: Read Manager's Mind
- RMT: ReMove Trap
- RMV: Remove Memory Virtues
- RN: Read Noise
- RNBS: Reflect Next Bus Signal
- RNR: Read Noise Record
- ROC: Randomize Op Codes
- ROC: Rotate Outward from Center
- ROD: ROtate Diagonally
- ROM: Read Operator's Mind
- ROO: Rub Out Operator
- ROOP: Run Out Of Paper
- ROPF: Read Other People's Files
- ROS: Reject Operating System
- ROS: Return On Shield
- RP: Read Printer
- RPB: Raise Parity Bits
- RPB: Read Print and Blush
- RPB: Reverse Parity and Branch
- RPBR: Reverse Parity and BRanch
- RPC: Rotate Program Counter
- RPM: Read Programmer's Mind
- RPU: Read character and Print Upsidedown
- RRC: Rotate Random thru Carry
- RRR: Randomly Rotate Register
- RRR: Read Record and Run away
- RRR: Read Record and Run-away
- RRRL: Random Rotate Register Left
- RRRR: Random Rotate Register Right
- RRSTC: Return on Ruby Slippers Triple-Click
- RRT: Record and Rip Tape
- RS: Random Slew
- RSD: on Read error Self-Destruct
- RST: Rewind and Stretch Tape
- RSTOM: Read from STore-Only Memory
- RT: Reduce Throughput
- RTP: Reduce ThroughPut
- RTS: Return To Sender
- RVAC: Return from VACation
- RWC: ReWind and Crash heads
- RWCR: ReWind Card Reader
- RWD: ReWind Disk
- RWE: Run Without Error
- RWF: Read Wrong File
- RWT: Read/Write while stretching Tape
- SA: Store Anywhere
- SAD: Search And Destroy
- SAI: Skip All Instructions
- SAK: Snooze At Keyboard
- SAS: Show Appendix Scar
- SAS: Sit And Spin
- SBE: Swap Bits Erratically
- SBF: Skip on Bitbucket Full
- SC: Scramble Channels
- SC: Shred Cards
- SCB: Spindle Card and Belch
- SCCA: Short Circuit on Correct Answer
- SCD: Shuffle and Cut Dec
- SCH: Slit Cards Horizontal
- SCI: Shred Cards Immediate
- SCM: Set for Crash Mode
- SCOM: Set Cobol-Only Mode
- SCP: SCatter Printer
- SCRRC: SCRamble Register Contents
- SCST: Switch Channel to Star Trek
- SCTR: Stick Card To Reader
- SD: Scramble Directory
- SD: Slip Disk
- SDC: Spool Disk to Console
- SDD: Seek and Destroy Data
- SDD: Spin Disk Dry
- SDDB: Snap Disk Drive Belt
- SDE: Solve Differential Equations
- SDI: Self Destruct Immediate
- SDM: Search and Destroy Memory
- SDR: Slam Down Rondo [worst soda ever made]
- SEB: Stop Eating and Burp
- SEOB: Set Every Other Bit
- SESUR: Sing Elvis Songs Until he Returns
- SEX: Set EXecution register
- SEX: Sign EXtend
- SFH: Set Flags to Half-mast
- SFP: Send For Pizza
- SFR: Send For Reinforcements
- SFT: Stall For Time
- SFTT: Strip Form Tractor Teeth
- SHAB: SHift A Bit
- SHABM: SHift A Bit More
- SHB: Stop and Hang Bus
- SHCD: SHuffle Card Deck
- SHON: Simulate HONeywell CPU [permanent no-op]
- SHR: SHift Random
- SHRC: SHRed Card
- SHRT: SHRed Tape
- SID: Switch to Infinite Density
- SIP: Store Indefinite Precision
- SJV: Scramble Jump Vectors
- SLP: Sharpen Light Pen
- SMC: Scramble Memory Contents
- SMD: Spontaneous Memory Dump
- SMR: Skip on Meaningless Result
- SMS: Shred Mylar Surface
- SNARF: System Normalize And Reset Flags
- SNM: Show No Mercy
- SNO: Send Nukes on Overflow
- SOAWP: SOlve All the World'd Problems
- SOB: Stew On Brew
- SOD: Surrender Or Die
- SOL: Shift On Low
- SOP: Stop and Order Pizza
- SOS: Sign Off, Stupid
- SOT: Sit On a Tack
- SP: Scatter Print
- SPA: Sliding Point Arithmetic
- SPB: Simulate Peanut Butter
- SPD: SPin Disk
- SPS: Set Panel Switches
- SPSW: Scramble Program Status Word
- SQPWYC: Sit Quietly and Play With Your Crayons
- SRBO: Set Random Bits to Ones
- SRBZ: Set Random Bits to Zeroes
- SRC: Select Random Channel
- SRC: Select Reader and Chew cards
- SRCC: Select Reader and Chew Cards
- SRD: Switch to Random Density
- SRDR: Shift Right Double Ridiculous
- SRO: Sort with Random Ordering
- SROS: Store in Read-Only Storage
- SRR: Shift Registers Random
- SRSD: Seek Record and Scar Disk
- SRSD: Seek Record and Scratch Disk
- SRTC: Stop Real-Time Clock
- SRU: Signoff Random User
- SRZ: Subtract and Reset to Zero
- SSB: Scramble Status Byte
- SSD: Scratch System Disk
- SSD: Stacker Select Disk
- SSD: Stop and Scratch Disk [3815]
- SSJ: Select Stacker and Jam
- SSJP: Select Stacker and JumP
- SSM: Solve by Supernatural Means
- SSM: Stacker Select Memory
- SSP: Seek SPindle
- SSP: Smoke and SPark
- SST: Seek and Stretch Tape
- SSW: Scramble Status Word
- ST: Set and Test
- STA: STore Anywhere
- STC: Slow To a Crawl
- STD: Stop, Take Drugs
- STM: STretch Magtape
- STM: Skip on Third Monday
- STO: Strangle Tape Operator
- STPR: SToP Rain
- STRIKE: STRIKE for more pay, better hours, etc.
- STROM: STore in Read-Only Memory
- STTHB: Set Terminal to Three Hundred Baud
- SUIQ: Subtract User's IQ
- SUME: SUprise ME
- SUP: Shred User Printout
- SUP: Solve Unsolvable Problem
- SUS: Stop Until Spring
- SUS: Subtract Until Senseless
- SWAT: SWAp Terminals
- SWN: SWap Nibbles
- SWOS: Store in Write-Only Storage
- SWS: Sort to Wrong Slots
- SWT: Select Wrong Terminal
- SWU: Select Wrong Unit
- SWZN: Skip Whether Zero or Not
- SZD: Switch to Zero Density
- TAH: Take A Hike
- TAI: Trap Absurd Inputs
- TARC: Take Arithmetic Review Course
- TBFTG: Two Burgers and Fries To Go
- TC: Transmit Colors
- TDB: Transfer and Drop Bits
- TDRB: Test and Destroy Random Bits
- TDS: Trash Data Segment
- TET: Triple Execution Time [SUN]
- TLNF: Teach me a Lesson i'll Never Forget
- TLO: Turn indicator Lights Off
- TLW: Transfer and Lose Way
- TN: Take a Nap
- TOAC: Turn Off Air Conditioner
- TOG: Take Out Garbage
- TOG: Time Out, Graduate
- TOH: Take Operator Hostage
- TOO: Turn On/off Operator
- TOP: Trap OPerator
- TOS: Trash Operating System
- TOW: Take Over World
- TPD: Terminal Printer Destruct
- TPD: Total Program Diagnostic
- TPD: Triple Pack Decimal
- TPDH: Tell Programmer to Do it Himself
- TPF: Turn Power oFf
- TPN: Turn Power oN
- TPO: Turn Power Off
- TPR: Tear PapeR
- TR: Turn into Rubbish
- TRA: Te Rdls Arvs [type ridiculous abbreviations]
- TRD: TRansfer and Drop bit
- TSH: Trap Secretary and Halt
- TSM: Trap Secretary and Mount
- TST: Trash System Tracks
- TT%CN: TeleType — Clunk Noise
- TT%EKB: TeleType — Electrify KeyBoard
- TTA: Try, Try Again
- TTIHLIC: Try To Imagine How Little I Care
- TTITT: Turn 2400 foot Tape Into Two 1200 foot Tapes
- TTL: Tap Trunk Line
- TTL: Time To Logoff
- TYF: Trust Your Feelings
- UA: Unload Accumulator
- UAI: Use Alternate Instruction set
- UAPA(AM): Use All Power Available (And More)
- UCB: Uncouple CPU and Branch
- UCIP: Update Card In Place
- UCK: Unlock Console Keyswitch
- UCLB: Uncouple Comm Lines and Branch
- UCM: Uncouple CoMm lines and branch
- UCPUB: Uncouple CPUs and Branch
- UDR: Update and Delete Record
- UER: Update and Erase Record
- UFO: Unidentified Flag Operation
- ULDA: UnLoaD Accumulator
- UMR: Unlock Machine Room
- UNPD: UNPlug and Dump
- UOP: Useless OPeration
- UP: Understand Program[mer]
- UPA: Use all Power Available
- UPC: Understand Program[mer]'s Comments
- UPI: Undo Previous Instruction
- URB: Update, Resume and Branch
- UTF: Unwind Tape onto Floor
- UTF: Use The Force
- UUBR: Use Undefined Base Register
- VAX: Violate All eXecutions
- VFE: Violate Field Engineer
- VFO: Violate Female Operator
- VMA: Violate Maintenance Agreement
- VNO: Violate Noise Ordinance
- VPA: Vanishing Point Arithmetic
- VVM: Vaporize Virtual Memory
- WAD: Walk Away in Disgust
- WAT: WAste Time
- WBB: Write to the Bit Bucket
- WBT: Water Binary Tree
- WC: Waste Core
- WCR: Write to Card Reader
- WDR: Warp disk DRive
- WED: Write and Erase Data
- WEMG: Write Eighteen Minute Gap
- WF: Wait Forever
- WGPB: Write Garbage in Process-control Block
- WHFO: Wait until Hell Freezes Over
- WHP: Wave Hands over Program
- WI: Why Immediate
- WI: Write Illegibly
- WID: Write Invalid Data
- WMC: Write Millions of Comments
- WNAM: We Need A Miracle
- WNHR: Write New Hit Record
- WNR: Write Noise Record
- WP: Write Poop
- WPET: Write Past End of Tape
- WPM: Write Programmer's Mind
- WSE: Write Stack Everywhere
- WSWW: Work in Strange and Wondrous Ways
- WUPO: Wad Up Printer Output
- WWLR: Write Wrong Length Record
- WWR: Write Wrong Record
- XXIO: eXecute Invalid Opcode
- XXKF: eXecute Kermit the Frog
- XXM: eXclusive Maybe
- XXMB: eXclusive MayBe
- XXOH: eXecute no-Op and Hang
- XXOR: eXecute OpeRator
- XXOS: eXchange Operator's Sex
- XXPR: eXecute PRogrammer
- XXPSW: eXecute Program Status Word
- XXSP: eXecute Systems Programmer
- XXVF: eXchange Virtue for Fun
- YAB: Yet Another Bug
- YASE: Yet Another Stupid Error
- ZAP: Zero and Add Packed
- ZAR: Zero Any Register
- ZD: Zap Directory
- ZEOW: Zero Every Other Word
- ZPI: ZaP Immediate