4.3BSD-Tahoe/usr/lib/learn/eqn/tinyms

.\" short set of macros to simulate behavior of
.\" most common -ms macros:
.\"   .PP, .LP, .EQ, .EN
.\"
.de PP
.br
.sp
.ll 60n
.fi
.ti +5n
..
.de LP
.br
.sp
.ll 60n
.fi
..
.de EQ
.sp
.ce
..
.de EN
.sp
..