Here I have shared some current concepts which becoming very useful and popular nowadays. These may be asked at the time of interview or exam. Concepts are taken from Wikipedia.

Web Application In computing, a web application or web app is a client–server software application in which the client (or user interface) runs in a web browser. Webmail, online retail sales, online auctions, wikis, instant messaging services are some common example. More...
Computer Network A computer network or data network is a telecommunications network which allows computers to exchange data using a data link. The nodes are connected through cable media or wireless media. Most computer networks transmitted data through the packets, which is a unit of data carried out by a packet switched network. In point to point network packet is no needed. It transmitted data through bitstream. More... Similar Concept- Network Topology, WWW, HTTP Repeaters, Hub, OSI Model, Network Bridge, Switches, Routers, Modem, Firewalls, Ethernet, LAN, MAN, WAN, Cloud Computing, Proxy Server.
Automation is a process of using the machinery for easily working and saving the human power and time. More... Similar Concept- ISO 2709, Koha, MARC Standard, OCLC, OPAC, Z39.50, Libsys, ILS/LMS, Open Source, MySQL, PostgreSQL, Web 2.0, RSS Feed, Open Source, Free Software, World Cat, TCP/IP, DBMS, RDBMS, Linux, Apache, Tomcat, PHP.
Digitisation Digitising or digitisation is the representation of an object, image, sound, document or signal (usually an analog signal) by generating a series of numbers that describe a discrete set of its points or samples. The result is called digital representation or, more specifically, a digital image, for the object, and digital form, for the signal. More...
Content Management System A content management system (CMS) is a computer application that supports the creation and modification of digital content using a simple interface to abstract away low-level details unless required, usually supporting multiple users working in a collaborative environment. Here is a list of some CMS and their details. More... Similar Concept- RDA, Metadata, FRBR, ISBD, Dublin Core, OAI-PMH