[2] Weiner was joined by Heinz Lycklama, also a veteran of AT&T and previously the author of a Version 6 Unix port to the LSI-11 computer.

INed offered multiple windows and context-sensitive help, paragraph justification and margin changes, although it was not a fully fledged word processor.

PC/IX omitted the System III FORTRAN compiler and the tar file archiver, and did not add BSD tools like vi or the C shell.

[12] To achieve good filesystem performance, PC/IX addressed the XT hard drive directly, rather than doing this through the BIOS, which gave it a significant speed advantage compared to MS-DOS.

[11] An editorial by Bill Machrone in PC Magazine at the time of PC/IX's launch flagged the $900 price as a show stopper given its lack of compatibility with MS-DOS applications.

[16] PC/IX was not a commercial success[17] although BYTE in August 1984 described it as "a complete, usable single-user implementation that does what can be done with the 8088", noting that PC/IX on the PC outperformed Venix on the PDP-11/23.

[19] This version of the INTERACTIVE UNIX System was praised by a PC Magazine reviewer for its stability.