What do the terms GSM, GPRS, SMS, WAP, IVR, MO, MT, CP and Sp in SP stand for respectively?

GSM: Global System for Mobile Communications. Wireless network. China Mobile and China Unicom operate.

GPRS: general packet radio service

SMS: short message (mobile phone short message)

Wap: Wireless application protocol, that is, wireless application communication protocol.

IVR: Value-added service of wireless voice service.

Mo: message original, that is, short message uplink, that is, the information sent by the user to SP.

MT: Mobile Terminate, which means short message downlink, that is, the information sent by SP to users.

CP:Content provider refers to the content provider of mobile data services or mobile value-added services.

SP: Service provider, that is, value-added service provider, is responsible for developing and providing services suitable for mobile phone users according to users' requirements.