The BLANC program suite is a set of programs which can be used for mac
romolecular structure determination by X-ray crystallography. The suit
e is designed to provide experienced crystallographers and students wi
th a number of simple tools, at the same time allowing the building an
d testing of new algorithms. Besides a set of small programs, the BLAN
C system introduces so-called superprograms which represent larger pro
grams composed of several smaller ones. They utilize the so-called bla
ck-box principle, requiring minimum preparation or intervention from a
user. The programs are written in standard Fortran77 and communicate
with each other by the standard BLANC data files. The package has been
ported to all the major platforms such as UNIX, VMS and DOS. A curren
t version of the suite is distributed by anonymous ftp.