Frameworks for common types:
('BKS', 'Books, Booklets, Workbooks');
('CF', 'CD-ROMs, DVD-ROMs, General Online Resources');
('SR', 'Audio Cassettes, CDs');
('VR', 'DVDs, VHS');
('AR', 'Models');
('KT', 'Kits');
('IR', 'Binders');
('SER', 'Serials');