Rahmi Arfian P.7B

Kentongan Has been used for a long time,

started from kingdom of demak, surakarta, yogyakarta and etc.

FunctionTo give information (code/sign)

for flood, robbery, party, celebration sign that praying time has come.

SmokeFamous for Indian tribe in

America

FunctionTo send secret information to

a friend or foe Sample: One cloud of smoke

mean danger three……………………. Trouble/request for help

Epigraphy and Palmyra palmFor correspondence started in

period of Kutai, Taruma Negara, Majapahit, Sriwijaya, and Mataram Kingdom

A telephone and cell phoneInvented by Alexander Graham Bell in 1876 from fix line to a cellular phone since April 3rd 1973.

Not only for communicating, ell phone also has many funcitions. Sending text messages, pocket camera, video recorder, portable radio and even your pocket PC.

TelevisionA communication media trough electronic equipment where you can see vivid picture and hear the sound. It gives you various information from all over the world, invented in 1883 by Paul Nipkow from black and white TV to colorful TV and INTERNET TV now.

TelegraphIs a long distance message

sender and reciver founded by Samuel F.B. Morse and Alexander Brain.

Telegraph uses Morse code (standard of tone, voice, or light transmitting data by differentiating dash and dot tap from sentence word, letter, number and punctuation mark message.

A message sent/received is called telegram.

Facsimile

Is a machine that s able to

send document trough

telephone network that

produce the same result as

the original document.

Founded in 1843 by

Alexander Bain from

Scotland.

It’s a scanner, modem,

network printer and

photocopier in one machine

caled FAX MACHINE

Communicating Radio

We sometimes called it

as a walkie-talkie or

handy-talky. It’s a 2

way radio that can be

used to communicate in

two ways. 2 or more

people can communicate.

Pager is personal telecomunication

tool to send and recieve short massage. Numerical pager can only recieve one way short massages and only consistsof a couple of digits, just like a phone number that can only be used to call. An alpha numerical pager can recieve a two way short massage service (SMS)

Satellite Phone The size of satelitte phone

is not as big as GSM phone. This phone has inter-reciever intercom function (just like walky-talky)

Equipped with an automatic scanner to scan waves and other impressive features

InternetInternet is one of most advancedx

products of communication and information technology at thnis moment . The development of intyernet started when computer networking technology was created in around 1960. initially, computer network was employed by the us force to develop nuclear weapons

At the first, our ancestors didn;t know any numerical symbols. Even so they had known ho to coun. For example they counbted cattlen that they harded. Every morning when they released the cattle , they carved lines on the tree. Each line for animals.

Other tools that were used to count were fingers, pebbels and knots on rope . In south america people of inca indian use rope’s knots as numerical symbols . Symbolizes by certain knots arragement . All the knots arragements are called kuipu

The beginning of computer invention was startednby a mathematician professor from england, charles Babbage. Babbage made a diffrence engine that was used to calculate diffrential equation. By using steam energy , the engine can save program and calculate and print the result automatically.

In 1890 Herman Hollerith from us census bureauwas ableto create punch card counting that uses punch card as a data medium.

In 1944 Howard Aiken from harvard univesity together with business machine(IBM). Succeded in creating a machine that was able to perform a series of arithmetic operation automatically. This machine was called Mark I

A. First generation computer was developed during world war II . The characteristic of the computervin this generation was that its operating system was made specifically for certain task.

B. Second Generation

The seccond generation computers didn’t have vacum tube anymore, wich was replaced by a transistor. There was also an anti-magnetic memory development to become smaller,faster relieable and mor efficient in energy using, compared to the predecessor

Thirs generation transistor ‘s componets that were used on

the second generation computer were replaced witg integaret circuit (IC). This is because transistor produced too much heat that could destroy computer’s internal partsic combined three elctronic componets in a small silicon disc was made from quartz sand