Working of Web work

Web pages are stored on web servers located around the globe. Entering the uniform Resource Locator) URL of a web page in your web browser or clicking a link sends a request to the server, which hosts the page. The server sends the web page to your computer and your web browser display it on your screen.

A web page is an electronically written document in a computer and in computer language we call it HTML (Hypertext Markup Language). Web pages can contain animation, video, graphics, text and sound as well as the other interactive features such as data entry forms. Every page has a unique address known as Uniform Resource Locator in short (URL) which identifies its location on the server. Web pages are usually containing hyperlinks to all other web pages. Hyperlinks are text and images that reference the URLs of other web pages.

Abacus Evolution of Computers

1) ABACUS

Abacus is a calculating device invented by the Chinese 3000 years ago. This device is mainly used to perform simple arithmetic operations. Abacus had movable beads fixed on the wires and this was used for arithmetic calculations especially for finding value notation. The digits are represented by beads of counters.

REPRESENTATION OF DECIMAL SYSTEM

In Abacus beads was used for representation of decimal system. The beads on the rightmost wire represent ones, the next neighboring wire represents tens and the next neighboring wire represents hundreds.

Arithmetic calculations such as addition or subtraction can be performed by moving the beads sideways. Each row represents a value and in the same way, each position of the bead also represents a value.