Difference between Phone and Chat

Parameter	Phone	Chat
Description	A telephone, or phone, is a telecommunications device that permits two or more users to conduct a conversation when they are too far apart to be heard directly.	Chat is a kind of communication over the Internet that offers a real-time transmission of text messages from sender to receiver. Chat messages are generally short in order to enable other participants to respond quickly. Thereby, a feeling similar to a spoken conversation is created, which distinguishes chatting from other text-based online communication forms such as Internet forums and email
Requirements	Telephone Number is Required from telecom service provider.	Email Address is Required (Digital Address) from valid mail server uses a program called Internet Relay Chat (IRC) that runs on an IRC Server.
Easiness	it is true that talking is, for most purposes, easier than writing	Generally more difficult than, talking because writing tends to

Difference Between Newspaper and Blog

Parameter	Newspaper	Blog
Description	A newspaper is a serial publication containing news, other informative and usually advertising. A newspaper is usually printed on relatively inexpensive, low-grade paper such as newsprint. The news organizations that publish newspapers are themselves often metonymically called newspapers	A blog (a truncation of the expression weblog) is a discussion or informational site published on the World Wide Web and consisting of discrete entries ("posts") typically displayed in reverse chronological order (the most recent post appears first)
Publication	Daily, Weekly, Monthly	No Limit
Print Media	Paper	CMS Tools Like Blogger from Google and Wordpress from Wordpress.
Content	General-interest newspapers typically publish news articles and feature articles on national and international news as well as local news. The news includes political events and personalities, business and finance, crime, severe weather, and natural disasters; health and medicine, science, and technology; sports; and entertainment, society, food and cooking, clothing and home fashion, and the arts. Typically the paper is divided into sections for each of those major groupings (labeled A, B, C, and so on, with pagination prefixes yielding page numbers A1-A20, B1-B20, C1-C20, and so on)	A typical blog combines text, images, and links to other blogs, Web pages, and other media related to its topic. Most blogs are primarily textual, although some

Difference between Mail and Email

Parameter	E-Mail	Mail
Description	Electronic mail is a method of exchanging digital messages from an author to one or more recipients. Email operates across the Internet or other computer networks.	The mail or post is a system for physically transporting documents and other small packages, as well as a term for the postcards, letters, and parcels themselves.
Address	It uses Electronic address to send or receive messages.	Physical Address is used to send or receive messages.
Route	No Specific route is followed	Specific Route is Followed
Stamps	Uses Digital Stamps	Physical Stamps are used
Cost	Very Much Cheap	Costlier than Email.
Time	E-Mails are delivered in very short durations from seconds to minutes.	Delivery is slow and may be in days or months.
Multiple Recipients	You can send copies of letters to multiple recipients at no extra cost.	You have to send individual letter to each person and will have to pay postage for each letter that you send. This is also a Time Consuming Process.

Computer Codes

1)   BCD (Binary Coded Decimal) Code:  This code is based on the idea of converting each digit of a decimal number into its binary equivalent in spite of converting the entire decimal value into a pure binary form. In this coding technique each decimal digit is independently converted to a  4 bit binary number which makes conversion process very easy.2⁴=16 configurations are possible but only first 10 are used to represent decimal digits from 0 to 9.

Character	BCD Code		Octal Equivalent
	Zone	Digit
A	11	0001	61
B	11	0010	62
C	11	0011	63
D	11	0100	64
E	11	0101	65
F	11	0110	66
G	11	0111	67
H	11	1000	70

Hard Disk Drive (HDD)

It is a data storage device and is made up of a thin circular discs, called "Platters", which are coated on both the sides by Magnetic Material. A Disk pack may consist of number of Platters and are mounted on a central shaft that rotates them in same direction with same speed.The Data is written or accessed in a random manner and individual blocks of data can be stored or retrieved in any order rather than just sequentially.It is connected to computer using different interfaces such as IDE, SATA or SCSI.

Information Storage: In HDD information is stored on all surfaces of platters except upper and lower surface of top and bottom platters respectively. thus,a  disk with 5 disk platters will have 8 recording surfaces. Each plotter is consist of no. of invisible concentric circles which are called tracks. A set of such corresponding tracks in all the surfaces is called cylinder. Tracks are further divided into sectors. * bit EBCDIC code is used for the information storage.The Information is stored in form of invisible magnetic spots. The Presence of magnetic spot represents binary 1 and absence represents binary 0.

The Outer tracks has greater circumference then inner tracks but each track consist of same no. of characters.Hence the data density of outer tracks is less as compare to inner tracks.

Computer Generations

First Generation(1942-1955)

This Generation is considered to be form 1942-1955. These Machines were designed with the help of vacuum tubes. The main features of this Generation Computer were:
1. Were designed with vacuum tube’s which was only electronic component available during those days.
2. These computers were fastest of their time and could perform calculations in milliseconds.
3. They were bulk in size due to the use of thousands of vacuum tubs.
4. These devices were non-potable and were more frequent to failure.


Second Generation(1955-1964)

 This Generation is considered from 1955 to 1964. This Generation was based upon transistor Technology. The first transistor invented at AT&T tall Laboratories 1947. The main feature of this Generation Computer were:
1. Used Transistor inspite of vacuum tubes.