This directory contains notes on the various IRAF ports. Most of these files do not contain an up-to-date record of the current ports, but rather these are historical notes taken during each port. The name of the host operating system is contained in each filename, while most files contain the relevant dates of ports or upgrades inside them. Some of this material may be of use to persons contemplating future ports. Conventions: aos AOSVS (Data General MV/10000) ctio Cerro Tololo Interamerican Observatory isi Integrated Systems; Jupiter workstation at IPAC nso National Solar Observatory st Space Telescope Science Institute sun Sun Microsystems sun2 SUN-2 hardware, SUN V2.0 sun3 SUN-3 hardware, SUN V3.0 v22 IRAF V2.2 (etc.) Where different files would otherwise have the same name, they are distinguished by the date of the last modification to the system that was part of the original "notes" file. For example, "sun3_062486.doc" is the "notes" file as it existed on a Sun-3 on June 24, 1986.