Off-by-one error (OBOE), a type of computer programming or mathematical error
One of the earliest fencepost errors involved time, where the Julian calendar originally calculated leap years incorrectly, due to counting inclusively rather than exclusively, yielding a leap year every three years rather than every four.
Soft error | Forward error correction | Xero Error | Inborn error of metabolism | Error detection and correction | Source-monitoring error | scrivener's error | Round-off error | Postage stamp design error | postage stamp design error | One error and its catastrophic results: ''Napoleon's invasion of Russia#Retreat | Off-by-one error | Observational error | Margin of Error (The Wire episode) | Margin of Error | Human error assessment and reduction technique | error function | error detection and correction | Erotic target location error | End of an Error (2004-2006) | End of an Error | Discretization error | Clerical error | Berkson error model |