wht is the use of computer,phone,pager,fax and who invented it?

Answer 1

All of these are used for communication among people and it has decreased distance across world.

Computer was invented by charles babbage.
Phone was invented by Alexander Graham Bell.
Pager was invented by Al Gross.
Fax was invented by Alexander Bain.

Answer 2

Computer:(Charles babbage)
A computer is a machine for manipulating data according to a list of instructions.

Computers take numerous physical forms. Early electronic computers were the size of a large room, consuming as much power as several hundred modern personal computers. [1] Today, computers can be made small enough to fit into a wrist watch and be powered from a watch battery. Society has come to recognize personal computers and their portable equivalent, the laptop computer, as icons of the information age; they are what most people think of as "a computer". However, the most common form of computer in use today is by far the embedded computer. Embedded computers are small, simple devices that are often used to control other devices—for example, they may be found in machines ranging from fighter aircraft to industrial robots, digital cameras, and even children's toys.

Phone:(Basic of grambell)
Phone is also a colloquial term for telephone. For the measure of the strength of sound, see Phon. For the movie, see Phone (film). For the suffix, see -phone.
Within phonetics, a phone is:

a speech sound or gesture considered as a physical event without regard to its place in the phonology of a language
a speech segment that possesses distinct physical or perceptual properties
a particular occurrence of a speech segment
the basic unit revealed via phonetic speech analysis
Phonetic symbology is set off within brackets.

Pager:(Marroon)

A pager is an electronic device used to contact people via a paging network. It pre-dates mobile phone technology, being most popular during the 1980s and 1990s, but similarly uses radio transmissions to communicate between a control/call center and the recipient. Many of today's pagers use the FLEX on-air protocol. The slower POCSAG on-air protocol is still used for some pagers in the United States and probably in other countries.

fax:(facsimile)
A fax machine is essentially an image scanner, a modem, and a computer printer combined into a highly specialized package. The scanner converts the content of a physical document into a digital image, the modem sends the image data over a phone line, and the printer at the other end makes a duplicate of the original document.

Fax machines with additional electronic features can connect to computers, can be used to scan documents into a computer, and to print documents from the computer. Such high-end devices are called multifunction printers and cost more than fax machines.

Although fax machines of some sort or another have existed since the mid-late 19th century (see "History" below), modern fax technology became feasible only in the mid-1970s as the sophistication and cost of the three underlying technologies dropped to a reasonable level. Fax machines first became popular in Japan, where they had a clear advantage over competing technologies like the teleprinter; at the time, before the development of easy-to-use input method editors, it was faster to handwrite kanji than to type the characters. Over time, faxing gradually became affordable, and by the mid-1980s, fax machines were very popular around the world.

However, although most businesses still maintain some kind of fax capability, the technology appears increasingly dated in the world of the Internet.

Answer 3

samsung

Answer 4

they all are mode of transport

Answer 5

Please dont ask stupid questions. ! Are you from another world?