excel-at-40.jpg

Excel is XL (40)

June 26, 2026
A talk I gave for Excel’s 40th anniversary about the history behind the first version of Microsoft Excel, along with a BBC Witness History interview about the same story.
A JavaScript code sample and the object diagram it produces

Object Oriented Programming in JavaScript

January 14, 2006
How to define classes, methods, and sub-classes in JavaScript using constructors and the prototype chain, written when AJAX was new and before JavaScript had a class keyword.
The opening of Alice's Adventures in Wonderland set in the 3x5 font

Tiny (3x5) Font

December 17, 2005
I created this very tiny (but legible) bitmap font in 1980 for an Apple II terminal emulator. Now available as a modern web font, with the full text of Alice's Adventures in Wonderland to read in it.