Applications of WAP, VOIP and GPRS?

GPRS, stands for General Packet Radio Service, and is a protocol for passing data over a mobile phone network. GPRS offers what has become known as "always on" data connection for GSM mobile phones, allowing for faster browsing of Internet content, and faster access to online services such as WAP and email.
WAP is wireless application protocol.
Voice over Internet Protocol (VoIP), is a technology that allows you to make voice calls using a broadband Internet connection instead of a regular (or analog) phone line. Some VoIP services may only allow you to call other people using the same service, but others may allow you to call anyone who has a telephone number - including local, long distance, mobile, and international numbers. Also, while some VoIP services only work over your computer or a special VoIP phone, other services allow you to use a traditional phone connected to a VoIP adapter.