If you have questions regarding any of these documents please contact the DWG chair (dwg-wg-chair@usb.org) and your questions will be channeled to the appropriate group.

Audio Class

Audio Device Document 1.0
Audio Data Formats 1.0
Audio Terminal Types 1.0
USB MIDI Devices 1.0
Audio Devices Rev. 2.0 Spec and Adopters Agreement (.zip format, size 1.28MB) 

Battery Charging

Battery Charging v1.1 Spec and Adopters Agreement (.zip format, size 292 KB)

Cable and Connector

Cable and Connector Class 2.0 
Series 'A' Plug form factor Guideline 1.0
USB Connector for Mezzanine Applications Guidelines Rev. 1.0
Micro-USB Cables and Connectors v1.01 Spec and Adopters Agreement

Common Class (CCS)

Common Class Base Specification 1.0

Communications Device Class

Class definitions for Communication Devices 1.2 (.zip file format, size 2.61 MB)
the components of CDC 1.1 have been reorganized as five separate documents:
ATM120.pdf -- CDC Subclass for Asynchronous Transfer Mode Devices
CDC120.pdf -- CDC Subclass for Communications Devices
ECM120.pdf -- CDC Subclass for Ethernet Control Model Devices
ISDN120.pdf -- CDC Subclass for ISDN Devices
PSTN120.pdf -- CDC Subclass for PSTN devices
CDC Subclass for Wireless Mobile Communication Devices 1.1
CDC v1.2 WMC v1.1 Adopters Agreement

CDC Subclass Specification for Ethernet Emulation Model Devices 1.0

Content Security

Device Class Definition for Content Security Devices 1.0
Content Security Method 1 - Basic Authentication Protocol 1.0
Content Security Method 2 - USB Digital Transmission Content Protection Implementation 1.0

Device Firmware Upgrade Group

Device Firmware Upgrade 1.1 (new version 31-Aug-2004)

HID Class

HID Information

Imaging Class

Still Image Capture Device Definition 1.0 and Errata as of 16-Mar-2007 (.zip format, size 200 KB)

IrDA

IrDA Bridge Device Definition 1.0

Mass Storage

Mass Storage Class Specification Overview 1.3
Mass Storage Bulk Only 1.0
Mass Storage Control/Bulk/Interrupt (CBI) Specification 1.1  
Mass Storage UFI Command Specification 1.0
Mass Storage Bootability Specification 1.0
Lockable Mass Storage Specification 1.0 and Adopters Agreement (.zip format, size 288 KB)
  - Lockable Mass Storage IP Disclosure

Media Transfer Protocol

Media Transfer Protocol v.1.0 Spec and MTP v.1.0 Adopters Agreement (.zip format, size 1.86MB)

Monitor

Monitor Device Document 1.0

OpenUSBDI

OpenUSBDI Specification 1.0

Personal Healthcare

Personal Healthcare Rev. 1.0, Errata for USB Personal Health Care Device Class and Personal Healthcare Adopters Agreement (.zip format, size 386 KB)

Physical Interface Devices

Device Class Definition for PID 1.0

Power

Power Device Class Document 1.0

Printer Class

Printer Device Class Document 1.1

Smart Card Class