Software engineer on the first 64 bits Unix (Cray).
System & network admin., security architect of a network 3000 @MAC wide.
30 years experience on top of Unix (-es + internals).
Chief Information Security Officer.
Skeptikal extremist, observer of this tiny graspable part of this Universe, hunter of the Key for a tiny lifetime.
1 Notation for function $ + \rightarrow \times $ Jul 21 '13
0 Composition of isometries Dec 19 '13