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Nastech Retail Sales of Computers and Accessaries, Communication Equipments, Software and Hardware Including Configuration of PABX after Purchased

Nastech retail sales deals with all kinds of Computers, such as Toshiba, Dell, Compaq, HP, Sony, Gateway, and also have in stock powerful labtop computer. We also sale printers and scanners, both office and commercial type. monitor and security aparatus. we also deal in automaic keys and keyless lock as well as biometric locks. We also have communication equipmene such as PABX and its phone. Walking taking are alos sold as well.

All in all, all what nastech will tell you is just click and and see it your self. This is your one stop high technological equipments and its installation as perfect as you will like it.

We also have wireless equipments, both Wifi and Wimax, atenna, dish and cables.


Power Computer

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When reading about PCs and servers, you'll often see the CPU described by the number of bits (e.g., 32-bit or 64-bit), here is what that means.


32-bit refers to the number of bits (the smallest unit of information on a machine) that can be processed or transmitted in parallel, or the number of bits used for single element in a data format. The term when used in conjunction with a microprocessor indicates the width of the registers; a special high-speed storage area within the CPU. A 32-bit microprocessor can process data and memory addresses that are represented by 32 bits.

64-bit therefore refers to a processor with registers that store 64-bit numbers. A generalization would be to suggest that 64-bit architecture would double the amount of data a CPU can process per clock cycle. Users would note a performance increase because a 64-bit CPU can handle more memory and larger files. One of the most attractive features of 64-bit processors is the amount of memory the system can support. 64-bit architecture will allow systems to address up to 1 terabyte (1000GB) of memory. In today's 32-bit desktop systems, you can have up to 4GB of RAM (provided your motherboard that can handle that much RAM) which is split between the applications and the operating system (OS).


We are all familiar with what a computer is in a specific, contemporary sense. Personal computers (PCs) are found in most aspects of daily life, and for some it is hard to even imagine a world without them. But the term means more than simply the Macs and PCs we are familiar with. A computer is, at its most basic, a machine which can take instructions, and perform computations based on those instructions.

It is the ability to take instructions — often known as programs — and execute them, that distinguishes a computer from a mechanical calculator. While both are able to make computations, a calculator responds simply to immediate input. In fact, most modern calculators are actually computers, with a number of pre-installed programs to help aid in complex tasks.

Computers range from the very small to the very large. Some are capable of doing millions of calculations in a single second, while others may take long periods of time to do even the most simple calculations. But theoretically, anything one computer is capable of doing, another will also be able to do. Given the right instructions, and sufficient memory, a computer found in a wristwatch should be able to accomplish anything a supercomputer can — although it might take thousands of years for the wristwatch to complete the operation.


Apple Mac Computer

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What is a Computer?

A computer is a programmable machine. The two principal characteristics of a computer are:

  • It responds to a specific set of instructions in a well-defined manner.
  • It can execute a prerecorded list of instructions (a program).
  • Modern Computers

    Modern computers are electronic and digital. The actual machinery -- wires, transistors, and circuits -- is called hardware; the instructions and data are called software.

    All general-purpose computers require the following hardware components:

  • memory: enables a computer to store, at least temporarily, data and programs.
  • mass storage device: allows a computer to permanently retain large amounts of data. Common mass storage devices include disk drives and tape drives.
  • input device: usually a keyboard and mouse, the input device is the conduit through which data and instructions enter a computer.
  • output device: a display screen, printer, or other device that lets you see what the computer has accomplished.
  • central processing unit (CPU): the heart of the computer, this is the component that actually executes instructions.
  • In addition to these components, many others make it possible for the basic components to work together efficiently. For example, every computer requires a bus that transmits data from one part of the computer to another.

    Computer Classification

    Computers can be generally classified by size and power as follows, though there is considerable overlap:

  • personal computer: a small, single-user computer based on a microprocessor. In addition to the microprocessor, a personal computer has a keyboard for entering data, a monitor for displaying information, and a storage device for saving data.
  • workstation: a powerful, single-user computer. A workstation is like a personal computer, but it has a more powerful microprocessor and a higher-quality monitor.
  • minicomputer: a multi-user computer capable of supporting from 10 to hundreds of users simultaneously.
  • mainframe: a powerful multi-user computer capable of supporting many hundreds or thousands of users simultaneously.
  • supercomputer: an extremely fast computer that can perform hundreds of millions of instructions per second.

    At one time, computers were extremely large, and required enormous amounts of power. This made them useful only for a small amount of tasks — computing trajectories for astronomical or military applications, for example, or code breaking. Over time, with technological advances, they were scaled down and their energy requirements lowered immensely. This allowed the power to be harnessed for a staggering array of uses.

    As prevalent as PCs are, they do not nearly begin to scratch the surface of computer use in our world. Interactive devices of all sorts contain their own computers. Cellular telephones, GPS units, portable organizers, ATM machines, gas pumps, and millions of other devices all make use of them to streamline their operations, and to offer features which would be impossible without one.

    A computer like this is often referred to as an embedded computer. The embedded type is differentiated from a PC because it is essentially static in its function. While a PC, some cellular telephones, and some personal organizers are able to have new software installed, and make use of a wide range of features, an embedded computer usually has only a few purposes, which are relatively fixed once the device is manufactured.

    Embedded systems vary in the amount of change that can happen to them after production. An MP3 player, for example, is an embedded computer, but can have quite a bit of interaction and changes made to it. It may allow the user to alter the colors used, change the clock, update firmware, and change the songs or playlists in memory. One within a traffic light, to take another example, is probably quite fixed. It is set to respond to a few certain programs — time of day, a trigger when a car approaches, and perhaps input from a central database in the case of more advanced systems. These programs are not built for interactivity, and will likely never be changed over the system’s life.

    The computer is one of the most powerful innovations in human history. With their use, people are suddenly able to perform a staggering amount of computations at dazzling speeds. Information can be crunched, organized, and displayed in the blink of an eye. As technology continues to advance, the computer will no doubt become even more pervasive — and in many cases, likely even less recognizable.

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