1891. Mathematics
      Mathematics Library and Application packages
1892. MatLisp
      A BLAS and LAPACK linear algebra library wrapper which makes their features accessible through a set of CLOS classes
1893. matrix
      See linear algebra
1894. Matt Revelle
      Matt Revelle is a Person
1895. Matt Sottile
      Matt Sottile is computer geek at the Los Alamos Natl
1896. Matthew Danish
      Still thinks he is a Person, despite graduating Carnegie-Mellon University with a Logic and Computation degree
1897. Matthew Kennedy
      Matthew Kennedy did the initial port of the Common Lisp Controller from Debian to Gentoo GNU/Linux and ported most of the Debian Common Lisp packages to it
1898. MatthewAstley
      Matthew is a Person who flew in from WardsWiki, Wiki:MatthewAstley
1899. Matthias Koeppe
      Matthias Koeppe is a Person
1900. Max Mouratov
      A Person interested in Lisp

CLiki the common lisp wiki