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Computer and tablets maintenance

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Written by Andrew Lomar   
Wednesday, 17 October 2012 12:35

Although mechanical calculating machines have existed for many centuries, the computers in the modern sense did not appear until the mid-twentieth century, when the first electronic computers were built. They had a considerable size of the premises and consuming hundreds of times more energy than today's personal computers (PC), and at the same time have a billion times less computing power. The definition also fit your device to convert the values ‚Äč‚Äčrepresented by the size of the constant (voltage or electric current). Programming involves determining the signal processing circuit switches, and optionally determining the constants using potentiometers.

These computers were used in the mid-twentieth century, and there were even specialized for this purpose integrated circuits. Currently, it does not pay to implement algorithms in analog technology, due to the low price of microprocessors. One can still find (e.g. in Russia) analog computers to calculate ballistic track artillery shells, however they will be replaced by digital computers. The Tablet PC is a portable personal computer. It is a device modeled on notebooks. Added to it, however, well-known feature of handhelds - the touch screen. Diagonals in tablet screens are smaller than notebooks, such as 7, 8 or 10 inches, but the rest of the parameters (pulse frequency, the size of RAM) matches notebooks. They have many features, such as handwriting recognition capabilities, onscreen keyboard. Tablet PCs are mainly based on systems of Microsoft Windows or Linux and Android. PDAs are programmable computers - you are free to install software, such as downloaded or purchased online. PDA supports, among other things with the stylus, as they are equipped with a touch screen. Most of them recognize handwriting (or close to it graffiti characters), and some also have a built-in miniature keyboard. The use of PDAs is very broad. They can be used both in private life and business. Basic functions: calendar, calendar, calculator, notepad (including handwritten notes), address book. Additional features include: reading e-books, store / view pictures and videos, edit text, working with GPS devices, built-in GSM module, voice recorder, built-in digital camera and camcorder, music (eg MP3), Internet services (web, e email, instant messengers, telnet, SSH), games and much more. Connectivity with other devices provide palmtops: infrared port (IrDA), Bluetooth and Wi-Fi. To synchronize with your desktop computer (in order to protect against loss of data) and installing software, is the most commonly used serial interface (eg USB) or Bluetooth. Most PDAs are devices running operating systems Windows Mobile, Palm OS and Nokia Internet Tablet OS. Increasingly, you can also meet the MDA (Mobile Digital Assistant). For professional use equipment produced by increased mechanical strength (one of the standard tests is a free fall from a height of 1.5 / 1.8 m on a concrete floor). These devices are much more expensive to buy, but their total cost of ownership (TCO) is comparable with the hardware "home". In addition, manufacturers offer a professional service package to ensure a quick repair (often based on a telephone exchange crash reports), and even replacing equipment damaged mechanically.

 

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