LISP 1.5 System Listing

A hyperlinked, marked-up version of the source code of the first Lisp implementation, LISP 1.5 for the IBM 704/709/7090/7094 computers. The code is ultimately derived from a 1961 listing of the system, whose text has been reconstructed by some intrepid retrocomputerists (Pascal Bourguignon, Rich Cornwell, and Bob Abeles)

Stations and transfers

For the last 10 years I have been able to draw around 1,753 stations from different European cities, motivated by the curiosity of understanding how engineers were able to fit underground stations comprising 4 or 5 lines under Place de la République in Paris or the Puerta del Sol in Madrid.

Collapse OS

is a Forth operating system and a collection of tools and documentation with a single purpose: preserve the ability to program microcontrollers through civilizational collapse.

Patterns - Abstract-Factory

In this series of blog posts I'd like to go through some of the well known design patterns and make a comparison between the implementation in Scala and Common Lisp. Scala is a statically typed, multi-paradigm language running on the Java Virtual Machine. Common Lisp is a dynamically typed, multi-paradigm language running natively on many platforms.

Niklas Luhmann-Archiv

Luhmann was famous for his extensive use of the "slip box" or Zettelkasten note-taking method. He built up a zettelkasten of some 90,000 index cards for his research, and credited it with making his extraordinarily prolific writing possible. It was digitized and made available online in 2019

Mines, from Simon Tatham's Portable Puzzle Collection

The first square you open is guaranteed to be safe, and (by default) you are guaranteed to be able to solve the whole grid by deduction rather than guesswork. (Deductions may require you to think about the total number of mines.)

A simple way to manage your household budget with Common Lisp and TravisCI

A cool hack