Breathing is the process of inhaling oxygen from the air and exhaling carbon dioxide into the air. Respiration refers to cellular respiration where oxygen is reacted with glucose to produce carbon dioxide,...

Atoms are the basic units that all matter is made of. Atoms are tiny, ranging from 0.1 to 0.5 nanometers in width. Each atom of any element is made up of protons, neutrons and electrons. Atoms of different...

A non-governmental organization (NGO) is a legally constituted organization that is created by legal persons and is not affiliated with any form of government. Non-profit organization (NPO) is an organization...

GPRS service was created as an addition to the GSM network to be able to send and receive data packets. 3G is a faster and a better version of GPRS.

CDMA allows multiple users on the same channel using unique codes. GSM divides users into time slots or on different frequencies, where only one user is allowed to use one channel slot at one time.