... CRT is due more to its relative cost and availability then to any technological superiority. RASTER-SCAN-CRT: A raster scan display device using CRT on the other hand directs the electron beam across the screen , one row at a time from top to bottom. In a raster scan display device, the screen is assumed to consists of a two dimensional matrix. Remember that the ... point of the screen corresponding to a matrix element is called pixel (picture element). Consider the same triangle that is to be drawn on a raster scan display device. This time the electron beam sweeps the whole screen, on...

• Word Count: 2738
• Approx Pages: 11
• Grade Level: High School

... servers, because SCSI is available as a fault tolerant disk subsystem (RAID systems), while IDE drives are found in most desktop and laptop machines. Increasingly, IDE drives are available in RAID configurations. Hard disks provide fast retrieval because they rotate constantly at high speed, from 5,000 to 15,000 rpm. In the 1980s, the first personal computer hard disks started at 5MB ... to the speed of the chips, in this case, 60 nanosecond 32MB DIMMs. Sometimes, there is an "M" for "mega" after the first digit; for example, 8Mx32. Following are some common configurations: Parity or No...

• Word Count: 5237
• Approx Pages: 21
• Grade Level: High School

... took on Sun's E6500 and E10,000 servers, HP's V2500 servers, and IBM's S80 servers. All of these servers range in price from hundreds of thousands of dollars for small configurations to over $1 million for large configurations. Therefore, all compete in a performance arena well above that of even the fastest NT/Intel server. One could call this backward integration. ...

• Word Count: 1326
• Approx Pages: 5

... designed by American engineer Howard Aiken (5). In 1946 the Electronic Numerical Integrator and Computer, or ENIAC, was put into operation (5). Using thousands of electron tubes, it was the first electronic digital computer. In the late 1950s transistors replaced electron tubes in computers, allowing a reduction in the size and power consumption of computer components (5). In the 1960s hybrid computers were tried that connected ... ...

• Word Count: 1043
• Approx Pages: 4
• Grade Level: Undergraduate

... designed by American engineer Howard Aiken (5). In 1946 the Electronic Numerical Integrator and Computer, or ENIAC, was put into operation (5). Using thousands of electron tubes, it was the first electronic digital computer. In the late 1950s transistors replaced electron tubes in computers, allowing a reduction in the size and power consumption of computer components (5). In the 1960s hybrid computers were tried that connected ... ...

• Word Count: 1038
• Approx Pages: 4
• Grade Level: Undergraduate

... designed by American engineer Howard Aiken (5). In 1946 the Electronic Numerical Integrator and Computer, or ENIAC, was put into operation (5). Using thousands of electron tubes, it was the first electronic digital computer. In the late 1950s transistors replaced electron tubes in computers, allowing a reduction in the size and power consumption of computer components (5). In the 1960s hybrid computers were tried that connected ... ...

• Word Count: 1041
• Approx Pages: 4
• Grade Level: Undergraduate

... designed by American engineer Howard Aiken (5). In 1946 the Electronic Numerical Integrator and Computer, or ENIAC, was put into operation (5). Using thousands of electron tubes, it was the first electronic digital computer. In the late 1950s transistors replaced electron tubes in computers, allowing a reduction in the size and power consumption of computer components (5). In the 1960s hybrid computers were tried that connected ... ...

• Word Count: 1005
• Approx Pages: 4
• Grade Level: Undergraduate

... price drop begins to slow as newer and faster PCs are introduced. Dell continues this method for system components as well. CD-ROM drives were first introduced in high-end configurations and gradually became a standard feature of all desktops. Faster speed CD-ROM drives and now DVD players follow the path. Dell's high level of (JIT) inventory control enables them to ... ...

• Word Count: 2490
• Approx Pages: 10
• Grade Level: Undergraduate

... network devices are organized. Four common LAN topologies exist: bus, ring, star, and tree. These topologies are logical architectures, but the actual devices need not be physically organized in these configurations. Logical bus and ring topologies, for example, are commonly organized physically as a star. One LAN can be connected to other LANs over any distance via telephone lines and radio waves ... ...

• Word Count: 487
• Approx Pages: 2
• Grade Level: High School

... input and output devices and RAMs of 1000-word capacity. Physically, they were much more compact than ENIAC: some were about the size of a grand piano and required 2500 small electron tubes. This was quite an improvement over the earlier machines. The first-generation stored-program computers required considerable maintenance, usually attained 70% to 80% reliable operation, and were used for ... ...

• Word Count: 2566
• Approx Pages: 10
• Grade Level: Undergraduate

... input and output devices and RAMs of 1000-word capacity. Physically, they were much more compact than ENIAC: some were about the size of a grand piano and required 2500 small electron tubes. This was quite an improvement over the earlier machines. The first-generation stored-program computers required considerable maintenance, usually attained 70% to 80% reliable operation, and were used for ... ...

• Word Count: 2566
• Approx Pages: 10
• Grade Level: Undergraduate

... input and output devices and RAMs of 1000-word capacity. Physically, they were much more compact than ENIAC: some were about the size of a grand piano and required 2500 small electron tubes. This was quite an improvement over the earlier machines. The first-generation stored-program computers required considerable maintenance, usually attained 70% to 80% reliable operation, and were used for ... ...

• Word Count: 2571
• Approx Pages: 10
• Grade Level: Undergraduate

... input and output devices and RAMs of 1000-word capacity. Physically, they were much more compact than ENIAC: some were about the size of a grand piano and required 2500 small electron tubes. This was quite an improvement over the earlier machines. The first-generation stored-program computers required considerable maintenance, usually attained 70% to 80% reliable operation, and were used for ... ...

• Word Count: 2566
• Approx Pages: 10
• Grade Level: Undergraduate

... input and output devices and RAMs of 1000-word capacity. Physically, they were much more compact than ENIAC: some were about the size of a grand piano and required 2500 small electron tubes. This was quite an improvement over the earlier machines. The first-generation stored-program computers required considerable maintenance, usually attained 70% to 80% reliable operation, and were used for ... ...

• Word Count: 2510
• Approx Pages: 10
• Grade Level: Undergraduate

... research group to develop the fifth generation computers. This generation is started from 1981 and is still in progress. Now the new technologies were adopted to develop ICs such as electron beams, X-rays or laser rays. The Very Large Scale Integration (VLSI) was developed so the computers become much smaller, faster and accurate then ever before. The first personal computer (PC ... ...

• Word Count: 1687
• Approx Pages: 7
• Grade Level: High School