The METAFONT sources written in SAIL are:
MFHDR.SAI	declarations common to all modules
MFNTRP.SAI	The main interpretation module
MFBASE.SAI	(part of MFNTRP, separated for ease of editing on Altos)
MFRAST.SAI	The main semantics module for raster manipulation
MFSYS.SAI	The main driver program
MFOUT.SAI	Output module for Stanford
MFPRS.SAI	Output module for XEROX PARC
MFFIL.SAI	File name handler for TENEX
MFPRE.SAI	Preprocessor driver program
ALFOUT.SAI[ALF,DEK]	(part of MFOUT, for Alphatype output)
PRESSO.SAI		(part of MFPRS, for Press output format)
DDHDR.SAI[CAR,HPM]	(part of MFRAST, for dynamic Datadisc display)
ADIS.SAI		(part of MFRAST, for dynamic Alto display)