meaning of oc 3

1. OC-12 Optical Carrier 12 OC-3 Optical Carrier 3 OC-48 Optical Carrier 48 OCAL On-Line Cryptanalytic Aid Language. ["OCAS: On-line Cryptanalytic Aid System", D. J. Edwards, MAC-TR-27, MIT Project MAC, May 1966. Sammet 1969, p. 642]. occam Note lower case A language based on Anthony Hoares CSP and EPL. Named after the English philosopher, William of Occam 1300-1349 who propounded Occams Razor. The occam language was designed by David May of INMOS to easily describe concurrent processes which communicate via one-way channels. It was developed to run on the INMOS transputer but compilers are available for VAX, Sun and Intel MDS, inter alia. The basic entity in occam is the process of which there are four fundamental types, assignment, input, output, and wait. More complex processes are constructed from these using SEQ to specify sequential execution, PAR to specify parallel execution and ALT where each process is associated with an input from a channel. The process whose channel inputs first is executed. The fourth constructor is IF with a list of conditions and associated processes. The process executed is the one with the first true condition in textual order. There is no operator precedence. The original occam is now known as "occam 1". It was extended to produce occam 2. Simulator for VAX ftp://watserv1. waterloo. edu/. Tahoe mailing list: case. syr. edu>. [David May et al, 1982. "Concurrent algorithms"]. ["Occam", D. May, SIGPLAN Notices 184:69-79, 1983].

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