Unit Checklist: Acids; Meaning Strong and weak acids Concentrated and weak acids Comparing strength of acids Using evolution of hydrogen and carbon (IV) oxides Using electrical conductivity Using PH Role of solvents in acidic properties of solvents Hydrogen chloride in water Hydrogen chloride in methylbenzene   Bases: Meaning Strong and weak bases (alkalis) Measuring strength of alkalis Using electrical conductivity Using PH values Effect of solvent type on properties of ammonia solution Ammonia n water Ammonia in methylbenzene Uses of acids and bases   Oxides and hydroxides Basic oxides Acidic…


Why Study about the Internet?

√ To understand what the Internet is, the services that it offers, what is required in order to get connected, as well as to establish a connection and log out of the Internet.

What is the Internet?

v It is a large no. of connected computers (or a large set of computer networks) linked together that communicate with each other, over telephone lines.

v It is a worldwide computer network connecting thousands of computer networks, through a mixture of private & public data using the telephone lines.

v It isa worldwide (global or an international) network of computers that provide a variety of resources and data to the people that use it.

v Internet refers to a global inter-connection of computers and computer networks to facilitate global information transfer. It is an interconnection of computers throughout the world, using ordinary telecommunication lines and modems.

The Internet uses VSATS (Very Small Aperture Telecommunication Systems) such as Telephone lines, Satellite.


Photo file

Since our Services moved from www.nestict.com/learn to www.lms.nestict.com, the  downloadable content  has become premium and private which requires an account and subscription fee for more information visit https://hrm.nestict.com/index.php/knowledge-base/  Existing users of this platform have automatic access to files!  To access the files visit https://www.nestict.com/v/course/view.php?id=35 or https://lms.nestict.com/resource/courses/school-notes-and-resource/ For inquiries chat with us or create a ticket at https://hrm.nestict.com/index.php/cpanel/add-ticket  Thank you



As an important supplement of this chapter, we have included in the following lines the meaning of some of the most used terms used in the world network of networks: the Internet.  Al Artificial Intelligence: Part of the Computer Science that studies the simulation of intelligence Access Provider: Server center that provides logical access to Internet, working as  gateway between the final user and Internet. ACK (Acknowledgment): Response signal ADSL (Asymmetric Digital Subscriber Line): Asymmetric system of data transmission over conventional telephone lines. There are working systems that reach speeds…


Word processing is the art of text manipulation.  It involves creating & producing professional looking documents such as letters, memos, reports, etc.  Definition of a Word Processor. v  A Word Processor is a computer program that enables a person to create, save, retrieve, edit, format, and print text based documents.  Initially, the term Word processor was used to refer a computer system with a special piece of software used for the production of documents.  Purpose of Word Processing.  A Word processor is a tool that can be used to prepare & produce documents.  It can…


keyboard hd

PRESSING THE CTRL KEY BY ITSELF DOES NOTHING IN MOST PROGRAMS. IN COMPUTER GAMES, CTRL IS OFTEN USED TO CROUCH OR GO INTO A PRONE POSITION. Ctrl+0         Pressing Ctrl and 0 (zero) at the same time reset back to the default zoom level. Ctrl+1         Switches to the first tab in a browser or another program with tab support. Ctrl+2         Switches to the second tab in a browser or another program with tab support. Ctrl+3         Switches to the third tab in a browser or another program with tab support. Ctrl+4         Switches to the fourth tab in a browser or another…