Communications and network software is used for the setup and management of digital communication networks such as LAN and WAN computer networks, electronic mail, FAX, audio and video networks, wireless communication systems, etc.
Mobile and wireless software is used to program and manage mobile and wireless devices such as cell phones, personal digital assistants (PDA), and global positioning systems (GPS).
Web application software is used in the design, implementation, optimization and maintenance of web sites and web clients. These tools include web browsers, plug-ins, scripting languages, and other similar applications.