He is the founder of Aladdin Enterprises and creator of Ghostscript, a free software PostScript and PDF interpreter.
Deutsch's other work includes the Smalltalk implementation that inspired Java just-in-time compilation technology about 15 years later.
[2] His published work and other public references before that time generally use the name L. Peter Deutsch (with a dot after the L).
Deutsch received a Ph.D. in computer science from the University of California, Berkeley in 1973,[6] and has previously worked at Xerox PARC and Sun Microsystems.
As of mid-2011, he has had six compositions performed at public concerts, and now generally identifies himself as a composer rather than a software developer or engineer.