|  | ..... July 1, 1991 | 
|  | .so #9/tmac/tmac.pm | 
|  | . | 
|  | .ig | 
|  | .nr VN 1	\" VN -- volume | 
|  | .nr NU 1	\" NU -- number | 
|  | .nr P< 1	\" P< -- starting page number | 
|  | .nr P> 1	\" P> -- ending page number | 
|  | .		\" month of issue, date received, date revised | 
|  | .ds MO February | 
|  | .ds DY December 31, 1990 | 
|  | .ds DR January 1, 1991 | 
|  | .TL "RUNNING TITLE" "RUNNING AUTHOR NAMES" | 
|  | Title | 
|  | .AU | 
|  | AUTHOR AND AUTHOR | 
|  | .AI | 
|  | Institution | 
|  | .AU | 
|  | AND | 
|  | .AU | 
|  | THIRD AUTHOR | 
|  | .AI | 
|  | HER INSTITUTION | 
|  | .AB | 
|  | .LP | 
|  | abstract | 
|  | .AE | 
|  | .OK "Word  Phrase or word  Another word" | 
|  | .SH | 
|  | LEVEL ONE HEADING | 
|  | .PP | 
|  | xxx | 
|  | .SH 2 | 
|  | Level 2 heading | 
|  | .PP | 
|  | zzz | 
|  | .Rf | 
|  | .IP 1. | 
|  | J. Author... | 
|  | .. | 
|  | . | 
|  | .nr LL 34P | 
|  | .ll \n(LLu | 
|  | .lt \n(LLu | 
|  | .nr LT \n(LLu | 
|  | .nr FO 49P+1i-1P	\" FO -- bottom of last line of text | 
|  | .nr HM .6i	\" HM -- header margin | 
|  | .nr PD 1u | 
|  | .nr PI .15i | 
|  | . | 
|  | .de TL		\" TL -- title | 
|  | .ps 7 | 
|  | SOFTWARE\(emPRACTICE AND EXPERIENCE, VOL. \\n(VN(\\n(NU), \\n(P<-\\n(P> (\\*(MO 20\\n(yr) | 
|  | .sp 6P-2v | 
|  | .ps 18 | 
|  | .vs 21p | 
|  | .ce 100 | 
|  | .		\" $1 is title running head, $2 is author running head | 
|  | .ds %o .tl '\s11\\\\n(%#\s0'\s8\\$1\s0'' | 
|  | .ds %e .tl ''\s8\\$2\s0'\s11\\\\n(%#\s0' | 
|  | .nr OL 0	\" undo pm | 
|  | .ev 2 | 
|  | .lt \\n(LLu | 
|  | .ev | 
|  | .. | 
|  | .de AU		\" AU -- JOE AUTHOR AND MARY AUTHOR | 
|  | .ie \\n(AU=0 .sp 3.25P-.5v | 
|  | .el .SP | 
|  | .nr AU +1 | 
|  | .ps 8 | 
|  | .vs 12p | 
|  | .ft R | 
|  | .. | 
|  | .		\" use .AU JOE // AND // .AU MARY if separate institutions. | 
|  | .de AI		\" AI -- author institution | 
|  | .ps 9 | 
|  | .vs 10p | 
|  | .ft I | 
|  | .. | 
|  | .de MH		\" MH -- us | 
|  | Bell Labs, Murray Hill, New Jersey 07974, U.S.A. | 
|  | .. | 
|  | .de AB		\" AB -- abstract/summary | 
|  | .sp 3P-0V | 
|  | .nr PS 9 | 
|  | .nr VS 10 | 
|  | .ft B | 
|  | SUMMARY | 
|  | .SP .4P | 
|  | .ce 0 | 
|  | .nr AB 1 | 
|  | .. | 
|  | .de AE		\" AE -- end of abstract | 
|  | .nr AB 0 | 
|  | .nr PS 11 | 
|  | .nr VS 12 | 
|  | .XX		\" do the goo on the bottom of page 1 | 
|  | .. | 
|  | .de OK		\" OK -- other keywords | 
|  | .ft 1 | 
|  | .sp .5P | 
|  | \s6KEY WORDS\s0   \s8\\$1\s0 | 
|  | .fl | 
|  | .. | 
|  | .de XX | 
|  | .KF bottom | 
|  | .SP 1.5P | 
|  | .lt \\n(LLu | 
|  | .nr x \\n(P>-\\n(P<+1 | 
|  | .af P< 0000 | 
|  | .if \\n(BT=0 .tl "0038-0644/\\n(yr/\\n(NU\\n(P<-\\nx$05.00""\f2Received \\*(DY\f1" | 
|  | .if \\n(BT=0 .tl '\(CO 20\\n(yr by John Wiley & Sons, Ltd.''\f2Revised \\*(DR\fP' | 
|  | .KE | 
|  | .. | 
|  | .am SH		\" SH -- unnumbered sub-heading | 
|  | .sp 2.5P-2V | 
|  | .if \\n(.$=0 .ce 100 | 
|  | .if \\$1=1 .ce 100 | 
|  | .if \\n(.$=0 .ft 1 | 
|  | .if \\$1=1 .ft 1 | 
|  | .if \\$1=2 .ft B | 
|  | .if \\$1>2 .ft I | 
|  | .nr SH 1 | 
|  | .. | 
|  | .am PP		\" PP -- fix up to add space, no indent.  doesn't work | 
|  | .if \\n(SH .SP .5 | 
|  | .if \\n(SH .in 0 | 
|  | .nr SH 0 | 
|  | .. | 
|  | .		\" Rf - start references | 
|  | .de Rf | 
|  | .SH | 
|  | \s9REFERENCES\s0 | 
|  | .nr PS 9 | 
|  | .nr VS 10 | 
|  | .LP | 
|  | .nr PI .15i | 
|  | .. | 
|  | . | 
|  | .nr PS 11 | 
|  | .nr VS 12 |