After Dark (1989) 66 Novelty DOS

After Dark, from Berkeley Systems, Inc, is a set of entertaining screen savers for Mac and Windows. After Dark for Windows started off as "Magic Screen Saver" for Windows 2.x. After Dark was most famous for its "Flying Toasters" screen saver. Afterdark was very popular on both the early Macintosh computers and Windows 3.0, as neither included any kind of screen saver or screen blanker that would help prevent screen burn-in.

• 1.0 for DOS

ChiWriter (1990) 7 Word Processor Mathematics DOS

ChiWriter is a WYSIWYG scientific text editor for DOS. Created by Cay Horstmann in 1986, it was one of the first that could write mathematical formulas on common PC computers.

• 4.2

Derive (1994) 3 Mathematics DOS

Derive was a computer algebra and graphing system, developed as a successor to muMATH by Soft Warehouse, Inc. in Honolulu, Hawaii, now owned by Texas Instruments. Derive was implemented in muLISP, also by Soft Warehouse. The first release was in 1988 for DOS. It was discontinued on June 29, 2007 in favor of the TI-Nspire CAS. The last and final version is Derive 6.1 for Windows.

• 2.x
• 3.x

Expert Astrologer (1993) 1 Novelty DOS

A computerized tool from Expert Software for displaying your personalized daily horoscope. It can also interpret your personality traits, values, temperament, attitudes, adaptation, [and gullibility]. Plots trends in business, fitness, creativity, and social activities. Prints chart wheels, calculates planet positions, [and empties your wallet.]

• 1993

SPSS/PC (1993) 1 Mathematics DOS

SPSS/PC+ is high end statistics package that supports organizing, analyzing, and graphing data.

• 5.x