These files contain programs for aligning sequences progressively. (see: Hardison, R. C., Chao, K.-M., Adamkiewicz, M., Price, D., Jackson, J., Zeigler, T., Stojanovic, N. and Miller, W. (1993) "Positive and negative regulatory elements of the rabbit embryonic $epsilon$-globin gene revealed by an improved multiple alignment program and functional analysis" DNA Sequence, 4, 163-176. Hardison, R. C., Chao, K.-M., Schwartz, S., Stojanovic, N., Ganetsky, M. and Miller, W. (1994) "Globin Gene Server: A prototype E-mail database sever featuring extensive multiple alignments and data compilation for electronic genetic analysis" Genomics, in press. Chao, K.-M., Hardison, R. C. and Miller, W. (1994) "Recent developments in linear-space alignment methods: a mini survey" Submitted. ) This package contains the following files: README README.yama README.yama2 README.yama3 Makefile yama.c lib.c (yama) yama2.c get_blocks.c lib.c (yama2) sub.h AC.h yama3.c get_blocks.c lib.c AC.c (yama3) man.yama (a manual page (in troff format) for yama) man.yama2 (manual pages (in troff format) for yama2) man.yama3 (manual pages (in troff format) for yama3) To make a compiled version under UNIX, type "make".