This page exists mainly to satisfy some deep psychological desire to express everything as lists (I blame LISP).
Languages
During my life I’ve developed in a large number of programming languages. I’ll attempt to summarise here:
| AMOS | 1990-1995 | Hobby |
| AmigaBASIC | 1989-1995 | Hobby |
| BBC BASIC | 1983-1988 | Academic |
| C++ | 1989-2001 | Academic + Commercial |
| C | 1989-Current | Academic / Commercial |
| Clojure | 2007-2011 | Commercial / Research |
| Common Lisp | 1997-2010 | Academic / Research |
| Cue | 2020-Current | Commercial |
| Erlang | 2008-2011 | Commercial / Research |
| Go | 2009-Current | Commercial / Research |
| IBM JCL | 1998-2000 | Commercial |
| IBM RPG | 1998-2000 | Commercial |
| Java | 1999-2008 | Commercial |
| Javascript / ECMAScript | 1995-Current | Academic / Commercial |
| Microsoft Visual BASIC 4,5 and 6 | 1998-2000 | Commercial |
| Motorola 68000 Assembly | 1989-1995 | Hobby |
| PHP | 2011 | Commercial |
| Progress 4GL | 1999-2000 | Commercial |
| Prolog | 1998 | Academic |
| Python | 1999-Current | Commercial / Research |
| Racket | 2010-Current | Research |
| Ruby | 2000-2003 | Commercial |
| Scheme | 1997-Current | Academic / Research |
| Sinclair BASIC | 1983-1989 | Hobby |
| Sun UltraSparc Assembly | 2000-2008 | Hobby |
| x86_64 Assembly | 2008-Current | Hobby |
| XSLT | 1999-2017 | Commercial |
Operating Systems
I’ve developed software for a range of operating systems:
| Amiga Workbench / Kickstart | 1989-1995 | Hobby / Academic |
| BeOS (R3 - R5.1) | 1996-2001 | Hobby |
| Linux (kernel 1.09 onwards) | 1994-Current | Hobby / Academic / Commercial |
| FreeBSD | 1998-Current | Hobby / Commercial |
| OpenBSD | 2000-Current | Hobby / Commercial |
| SunOS / Solaris (5.7/7 - 5.11 / 11) | 1998-2011 | Hobby / Commercial |
| OpenSolaris and derivaties | 2010-Current | Hobby |
| Minix | 1995-2000 | Academic |
| Minix3 | 2005-Current | Hobby |
| QNX RTP / Neutrino 2 | 2000-2003 | Commercial |
| Plan9 | 1998-Current | Hobby |
| L4 / Genode | 2016-Current | Hobby |
| Windows 95, 98, ME | 1995-2000 | Academic / Commercial / Hobby |
| Windows NT 3.5 / 4 / 2000 | 1995-2002 | Academic / Commercial |
| Digital UNIX | 1995-1998 | Academic |
| MS DOS | 1988-1992 | Academic |
| IBM OS/400 | 1998-2000 | Commercial |