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the amount of money in circulation given by M1 plus most private-sector bank deposits and holdings of money-market instruments Also called PSL1
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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m4 in Technology

A macro processor for Unix and GCOS which is more flexible than cpp. m4 copies its input to the output, expanding macros which can be either built-in or user-defined. m4 has built-in functions for including files, running Unix commands, doing integer arithmetic, manipulating text in various ways and recursing. m4 can be used either as a front-end to a compiler or as a stand-alone tool.
sendmail's configuration file (/etc/ is writen in m4 macros.
There is a GNU m4 v1.1 ( by Francois Pinard and a public domain version by Ozan Yigit and Richard A. O'Keefe (FTP from any 386BSD, NetBSD or FreeBSD archive). A Macintosh version is here (
See also m3, m5.
["The M4 Macro Processor", Kernighan & Ritchie, Jul 1977].
The Free On-line Dictionary of Computing, © Denis Howe 2010
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