POSIX specification for the vi text editor

mawkdown - A lightweight markup tool for POSIX systems

rewrite of passwordstore in posix sh

scdoc is a simple man page generator for POSIX systems written in C99.

This essay shows a summary of how to handle filenames correctly for the impatient.

IBS provides a very useful, very capable disk-to-disk backup system. After the first backup run, all following backups are incremental based on the previous backup, and yet through the magic of Unix hard links, each individual backup LOOKS like a "full" backup, but only takes up disk space incrementally.

The Open Group Base Specifications Issue 7, 2018 edition