.bd S 3 3 \" embolden special font in context of 3
.if t .nr PI .25i \" paragraph indent
.nr PS 10 \" text point size
.nr VS 12 \" text vertical (inter-line) spacing
.nr dP 1 \" delta point size for program
.if n .nr NH 1 \" space after NH or SH heading
.cs 3 25 \\n(PS-1 \" constant space
.nr P \\n(PS \" current point size
.nr S \\n(PS+1 \" 1 points bigger
.nr s \\n(PS-1 \" 1 points smaller
.if n .ta 5 10 15 20 25 30 35 40 45 50 55 60
.nr t 5*33u \" width in 9 point CW
.if t .ta 1u*\\ntu 2u*\\ntu 3u*\\ntu 4u*\\ntu 5u*\\ntu 6u*\\ntu 7u*\\ntu 8u*\\ntu 9u*\\ntu 10u*\\ntu 11u*\\ntu 12u*\\ntu 13u*\\ntu 14u*\\ntu
.hy 14 \"2=not last lines; 4= no -xx; 8=no xx-