network cable

Start your computer and log on to Microsoft Windows. Windows automatically detects that you are connected to the Internet. 

A router (which might also have wireless networking built in) allows you to connect several computers to each other and to the Internet. The router sits between your computers and the modem provided by your ISP. You connect the router to the modem, and then connect all your computers to the router.To connect more than one computer to the Internet, you need a

Microcomputer

Computers are of different types based on size, work, model, brand, etc. So today a simple answer for “what/which computer you have?” is not sufficient. A single computer can be micro in the basis of size, IBM on the basis of brand, AT on the basis of model, and digital on the basis of work. In this way, we can find different computers on different basis.

But the latest in use is the micro computers or personal computers. These are the smallest computers system based on size. These computers are called micro because of the use of microprocessor as memory and are very small. These computers are called PC (personal computers) or home computers. The smallest of this category are laptop, notebook, palm top computers. The size is reducing day by day and it can be kept on top of the desk, on top of your lap, like a notebook and even on your palms. The advancement of technology is bringing computers with special features and reduced size.

Memory Unit

The basic processing of a computer begins with memory fetch or read cycle and the memory fetch is routed to the memory unit.

The memory unit consists of a large number of storage locations each with its own unique address. The CPU can randomly access any location in memory where RAM is often used. And this memory organization is typical for most microprocessors today. RAM being a volatile memory there should be power for the memory to contain data so a portion of memory unit is often built using read-only memory (ROM) chips. The program stored by a ROM is permanent and is not lost when power is removed. The memory unit’s address selector/decoder circuit examines the binary number on the address lines and selects the proper memory location to be accessed. In example, CPU is reading from memory, it activates its Memory Read control signal. This causes the selected database in memory to be placed onto the data lines and routed to the instruction register within the CPU. This is how memory unit works.

RAM

Ram is simply Random Access Memory. RAM is a part of main memory. RAM is called main memory because we can randomly and quickly access any location in memory. It is used to store instructions waiting to be obeyed, instructions currently being obeyed, data awaiting processing, data currently being processed, and data awaiting output.

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Alternative versions:

 as 4 without ATA sockets 

as 3 with labels for ATA sockets 

as 2, but flipped 

rotated display, PCI sockets moved

Computer Batteries

CPSC is still interested in receiving incident or injury reports that are either directly related to this product recall or involve a different hazard with the same product. Please tell us about it by visiting

The U.S. Consumer Product Safety Commission is charged with protecting the public from unreasonable risks of serious injury or death from thousands of types of consumer products under the agency's jurisdiction. The CPSC is committed to protecting consumers and families from products that pose a fire, electrical, chemical, or mechanical hazard. The CPSC's work to ensure the safety of consumer products - such as toys, cribs, power tools, cigarette lighters, and household chemicals - contributed significantly to the decline in the rate of deaths and injuries associated with consumer products over the past 30 years.

To report a dangerous product or a product-related injury, call CPSC's Hotline at (800) 638-2772 or CPSC's teletypewriter at (301) 595-7054. To join a CPSC e-mail subscription list, please go to
 Consumers can obtain recall and general safety information by logging on to CPSC's Web site at

IBM PC's

The IBM Personal Computer of 1981


When the IBM Personal Computer (IBM 5150) was introduced to the world 25 years ago, it was dramatically clear to most observers that IBM had done something very new and different. Here you had a large company, steeped in tradition, that had been willing and able to set aside its "business as usual" methods to produce in volume a highly competitive, tiny computer of top quality, intended for both consumers and businesses. And IBM was able to do all that and roll out its first PC in just one year.

It wasn't that long before the August 1981 debut of the IBM PC that an IBM computer often cost as much as $9 million and required an air-conditioned quarter-acre of space and 60 people to run and keep it loaded with instructions.

The IBM PC changed all that. It was a very small machine that could not only process information faster than those ponderous mainframes of the 1960s but also hook up to the home TV set, process text and store more words than a huge cookbook -- all for a price tag of less than $1,600.

Though personal computers of various types had been spawned by and built for hobbyists, IBM's new offering was also a business tool with advanced features to immediately make it a very attractive offering for a variety of users. The announcement of the IBM Personal Computer signaled the company's determination to compete in the emerging and growing segment of the information processing industry in which PCs were soon to become general business machines.

In short, the introduction of the IBM Personal Computer a quarter-century ago set a worldwide personal computing standard and helped to establish a multibillion-dollar industry.