3 Commonalities *************** Many aspects of the TeX system are the same among more than one program, so we describe all those pieces together, here.
· Option conventions - or -, = or ' ' for values. · Common options -help -version -verbose, and TeX/MF/MP options. · Path searching Features of the common path searching library. · Output file location TEXMFOUTPUT allows output in places other than '.'. · Three programs TeX, Metafont, and MetaPost have a lot in common.