Simtel MSDOS CDROM, Sep 1997.  Walnut Creek CDROM.
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 UBASIC: High-precision math
 path: \disc2\ubasic 
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00readme.txt Information about files in this directory
ub874.zip    High precision math-oriented BASIC interpreter
ub874gr.zip  Standard VGA graphics applications for UBASIC
ubmalm.zip   UBASIC number theory pgms by Donald E.G. Malm
ubppmpqs.zip UBASIC prime factorization pgm for 386/486