EDSAC Subroutine Library Concept

Maurice Wilkes, David Wheeler, and Stanley Gill published 'The Preparation of Programs for an Electronic Digital Computer,' detailing the first organized collection of reusable subroutines for the EDSAC computer.

Significance

This publication marked the conceptual birth of external libraries, formalizing the idea of reusable code modules that could be called by different programs, dramatically improving programming efficiency.