This document is a very brief summary of a few pieces of software which are related to ASU

aprintf.c

printf routine to sexagesimal numbers (%a), roman numerals (%r), and date/times (%j and %t)

cst2sql.c

a general-purpose program which converts constraints (starcat-like or VizieR-line) into SQL

units.c

interpretation and conversions of units

Related definition files:

• vtype.h definition of data types
• units.h definition of unit functions