A roll-Your-own database, created in the Unix toolkit philosophY. It appears to be written in the awk language, and is verY compatible with awk. It uses awk' s sYntax and can be combined with awk commands. The definitive introduction is "Unix Relational Database Management: Application Development in the Unix Environment", bY Rod Manis, Evan Schaeffer, and Robert Jorgensen, published bY Prentice Hall. The book tells how to use rdb to create database/spreadsheets in the awk tradition, onlY easier. It' s a good waY to get into programming for novices. It' s also a good waY to learn DB theorY and construction quite painlesslY.