m4

A macro processor for Unix and GCOS which is moreflexible 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 Unixcommands, doing integer arithmetic, manipulating text invarious ways and recursing. m4 can be used either as afront-end to a compiler or as a stand-alone tool.

sendmail's configuration file (/etc/sendmail.cf) is writenin m4 macros.

There is a GNU m4 v1.1 by FrancoisPinard and a public domain versionby Ozan Yigit and Richard A. O'Keefe (FTP from any 386BSD, NetBSD orFreeBSD archive). A Macintosh version is here.

See also m3, m5.

["The M4 Macro Processor",Kernighan & Ritchie, Jul 1977].

M4

FAB classification

French-American-British classification of acute leukemia Hematology A schema that divides acute leukemias into lymphoid–ALL or myeloid–AML cell lines; of childhood ALL, 70% are predominantly L1, 27% are L2, and 3% or less are L3 or Burkitt cell type, in adults with ALL, 30% are L1, 65% are L2, and 5% are L3 FAB classification, acute leukemias Acute lymphocytic leukemia (ALL) L1 Small monotonous lymphocytes L2 Mixed L1- and L3-type lymphocytes L3 Large homogeneous blast cells Acute myeloid leukemia (AML) M1 Myeloblasts without maturation M2 Myeloblasts with maturation (best AML prognosis) M3 Hypergranular promyelocytic leukemia (faggot cells) M3V Variant, microgranular promyelocytic leukemia M4 Myelomonocytic leukocytes M5 Monocytic, subtype a. Poorly differentiated monocytic leukemia b. Well differentiated monocytic leukemia M6 Erythroleukemia/DiGuglielmo syndrome M7 Megakaryocytic leukemia Pleomorphic undifferentiated cells with cytoplasmic blebs; myelofibrosis or ↑ BM reticulin; positive for platelet peroxidase antifactor VIII

M4

AMMoL

Acute myelomonocytic leukemia.

Acronym

Definition

M4➣Fourth-Year Medical Student