DISCAN was a tool for content and discourse analysis originally available for mainframe computers, and adapted for PCs with DOS 3.0 in 1991. It accepted ASCII files, could create KWIC and co-occurrence listings, and had modules for both creating content analysis dictionaries and performing content analysis.
Comments
More information about DISCAN's PC version is available in the following article:
Martindale, Colin. \"Technical Reviews: DISCAN: Software for Content and Discourse Analysis.\" Computers and the Humanities 25.6 (1991): 439-442. Web.