Books by Philip Zimmermann
Landscapes of the late Anthrop
Landscapes of the late Anthropocene
"Wir denken voll Wehmut zuruec
"Wir denken voll Wehmut zurueck."
Sanctus Sonorensis
Sanctus Sonorensis
Pretty good privacy 3.0 pre-al
Pretty good privacy 3.0 pre-alpha source code, preliminary release 1.1
PGP source code and internals
The official PGP user's guide
High tension
Yellow pages C, commercial-ind
Yellow pages C, commercial-industrial directory