The Three Types Of Pagers

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The world has changed its technology over the years. Advancing from one object to the next. Some of the very first devices, whether its for communication, entertainment, and so on, will be mentioned. A pager, or a beeper, is a personal device of communication used for requesting a call or sending a text message. It was invented in 1956 in London, mostly for doctors who had emergencies to go to. There are three types of pagers: numeric, alphanumeric, and two-way alphanumeric. Numeric pagers are the simplest which show only a phone number to be called. Alphanumeric pagers show the phone number and have the ability to receive a text. Two-way alphanumeric pagers not only receive the number and the text, but also have the ability to send text…show more content…
It is widely used and very common, almost every household has one. It was first available in the late 1930s and from then on other devices have been created for it, which will be mentioned later. However, the TV’s design has changed a lot. Back then, it looked like a big box with a small screen, and had more buttons for power, volume, brightness, contrast, channel tuning, and so on. Nowadays, the TV is sold mostly as a big, flat screen (or a flat panel called “LCD” or “plasma”) and it looks a whole lot better. There are different sized screens in width and length, but the depth is as thick as 1 inch. It’s much more convenient but could be a little more expensive than a regular TV. VCR stands for Video Cassette Recording. It is a device that plays tapes. It was the first successful home system to watch videocassettes on the television. It is also used to record television programs. They were first built around the 1960s and were available to buy around the 1970s. There are two types of VCR technology, which are Betamax, and more common,…show more content…
This has affected the world because a computer is a common machine used in many households. It maneuvers data through a form of instructions. The very first computer was around the 1940s and it was huge. Probably the size of a large room and used a lot of power, about a hundred of modern computers. Nowadays, computers are smaller and take up a lot less power. It is said that they could be made small enough to fit into a wrist watch and be powered from the battery of the watch. They could also store more memory than before. You can add games, music, pictures, go on the Internet and surf the web, play online games, and so on. Not only does a computer help for personal needs, it is ‘embedded’ in other devices to help them work, such as aircraft, robots, digital cameras, and even toys for children. The creation of computers, or the history of what lead to create a computer, dates back to the year 1623, changing in the year 1837, then in the 19th century and the 20th century. Some very old computers were called Zuse Z3, Atanasoff-Berry Computer, Colossus, Harvard Mark I – IBM ASCC, and ENIAC. The computer is very useful, it contains many tools and programs that help us use it faster, easier, and a whole lot better than
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