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Glossary starting with no. 1-9

- : - (dash) is a short strip of following lengths which is used for punctuation.  For example - to make a library card we should give a dash after every full stop.

< and >: These symbols are referred to as the greater than (>) and less than (<) symbols.

1G: 1G refers to the first generation of wireless cellular technology (mobile telecommunications). The main difference between the 1G and 2G is that the radio signals used by 1G networks are analog, while 2G networks are digital.

12-hour Clock: The 12-hour clock runs from 1 A.M. to 12 noon and then from 1 P.M. to 12 midnight.

2G: 2G is short for second-generation cellular network. 2G technologies enabled the various networks to provide the services such as text messages, picture messages, and MMS (multimedia messages). All text messages sent over 2G are digitally encrypted, allowing the transfer of data in such a way that only the intended receiver can receive and read it.

24-hour Clock: The 24-hour clock uses the numbers 00:00 to 23:59 (midnight is 00:00).

24/7: 24/7 denote a service or product which is available in online or offline mode twenty-four hours a day, seven days a week and 365 days in a year.

3D: 3 D represent three-dimensional. It describes an image that provides the perception of depth.

3G: 3 G is a short for third generation. It is the third generation of wireless mobile telecommunications technology. 3G telecommunication networks support services that provide an information transfer rate of at least 144 kbit/s. 3G finds application in wireless voice telephony, mobile Internet access, fixed wireless Internet access, video calls and mobile TV.

4G: 4G is the fourth generation of broadband cellular network technology, succeeding 3G.  Potential and current applications include amended mobile web access, IP telephony, gaming services, high-definition mobile TV, video conferencing, and 3D television.

5G: In telecommunications, 5G is the fifth generation technology standard for cellular networks. The main advantage of 5G networks is that they will have greater bandwidth, giving faster download speeds, eventually up to 10 gigabits per second (Gbps).

Badan BarmanDr. Badan Barman at present working as an Assistant Professor in the Department of Library and Information Science, Gauhati University, Guwahati-781014, Assam, India. He is the creator of the LIS Links ( - India’s most popular social networking website for Library and Information Science professionals. He also created the Open Access Journals Search Engine (OAJSE) (, UGC NET Guide (, Assam Archive ( and LIS Study ( website.

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