общеэкономический термин, употребляется в Великобритании (денежный агрегат) М4 (денежный агрегат, получаемый путем сложения денежного агрегата М1, банковский депозитов частного сектора и таких инструментов денежного рынка, как казначейские векселя)
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/sendmail.cf) is writen in m4 macros.