3GPP UMTS Draft Specifications

21 series Requirements Specifications
22 series Service aspects
23 series Technical Realization
24 series Signaling Protocols (MS - Core Network)
25 series Radio Aspects
26 series Codec (speech, video etc)
27 series Data
28 series Signaling Protocols (RSS - Network Part)
29 series Signaling Protocols (NSS)
30 series Program Management
31 series UIM
32 series Operation and Management
33 series Security Aspects
34 series Test Specifications