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Off By One · Code & math

Off By One collects the bugs, proofs and late-night commits every programmer and math major recognizes. Rubber ducks, exercises left to the reader and code that worked once and never again. Wear the stack trace with pride.

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18 designs · shown on Acrylic Keychain

DEBUGGING SOCIETY, LOCAL 1{ }RUBBER DUCKUVPRINTS.USnew
Off By One· Keychain

Rubber Duck Society Crest

$9 · from $8

{ }DEBUG SCOUTEXPLAINED IT TO THE DUCKUVPRINTS.USstaff pick
Off By One· Keychain

Debug Scout Patch

$9 · from $8

RUNS ON MY MACHINECERTIFIED BY ONE LAPTOPUVPRINTS.USTexturedstaff pick
Off By One· Keychain

Runs On My Machine Stamp

$9 · from $8

HELLO WORLDMERIT: FIRST PROGRAM RANUVPRINTS.USTextured
Off By One· Keychain

Hello World Patch

$9 · from $8

OFF-BY-ONESPECIMEN NO. 1. OR 0. UNCLEAR.UVPRINTS.USnew
Off By One· Keychain

Off-By-One Specimen Label

$9 · from $8

NULL, ZERO, NEGATIVE, HUGEABCEDGE CASE DEPT.UVPRINTS.US
Off By One· Keychain

Edge Case Dept Crest

$9 · from $8

LOOPVARSITY RECURSION. SEE: LOOP PENNANTUVPRINTS.US
Off By One· Keychain

Recursion Pennant

$9 · from $8

SAVED, PROBABLYBACKED UP TO THE SAME FLOPPYUVPRINTS.USTextured
Off By One· Keychain

Saved Probably Stamp

$9 · from $8

PI, SLICED3.14159 AND COUNTING. NO END.UVPRINTS.US
Off By One· Keychain

Pi Sliced Label

$9 · from $8

3 A.M. INCIDENT DIVISIONON CALLUVPRINTS.US
Off By One· Keychain

On Call Crest

$9 · from $8

FLIP FLIP FITINSERTION PROCEDURE V3UVPRINTS.US
Off By One· Keychain

Flip Flip Fit Patch

$9 · from $8

LEFT TO READERTHE PROOF IS TRIVIAL. QED.UVPRINTS.USTextured
Off By One· Keychain

Left To Reader Seal

$9 · from $8

SURVIVED STATSGRADED ON THIS VERY CURVEUVPRINTS.USTextured
Off By One· Keychain

Survived Stats Seal

$9 · from $8

MERGE CONFLICTRESOLVED BY KEEPING BOTHUVPRINTS.USTextured
Off By One· Keychain

Merge Conflict Stamp

$9 · from $8

KLEIN BOTTLENO INSIDE. DO NOT FILL.UVPRINTS.US
Off By One· Keychain

Klein Bottle Label

$9 · from $8

BIG O CLUBQUADRATIC. IT FINISHED.UVPRINTS.US
Off By One· Keychain

Big O Club Patch

$9 · from $8

ROBOTSVARSITY. IT MOVED. UNPROMPTED.UVPRINTS.US
Off By One· Keychain

Robotics Pennant

$9 · from $8

SECURE ENOUGHSEE STICKY NOTE ON MONITOR123UVPRINTS.USTextured
Off By One· Keychain

Secure Enough Seal

$9 · from $8

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