Simtel MSDOS Archive CDROM, August 1996.  Walnut Creek CDROM.
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 The APL mathematics language
 path: \disc2\apl 
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complex.zip  STSC APL fcns for cmplx math, polynomials, & c
iapl111.zip  ISO/ANSI/BSI-conforming APL interpreter v1.11
ratapl.zip   Rationalized APL\PC v T1.4, by Andreas Werder
saplpc_a.zip Sharp Assoc. APL interpreter -- 1 of 2
saplpc_b.zip Sharp Assoc. APL interpreter -- 2 of 2