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.