Computer Scientist Edsger W. Dijkstra's argument that counting for computer scientists should always start at zero = Here
Note that the classic book on the C computer programming language by Kernighan and Ritchie (Brian Kernighan and Dennis Ritchie The C Programming Language, Prentice-Hall 1978; ISBN 0-113-110163-3). Has a zeroeth Chapter - before Chapter 1.