Computer Hardware

USB version 1.1( sometimes called Basic speed USB or Orginal USB) allows for two speesd,1.5 Mbps and 12 Mbps. USB version 2.0 (sometimes called hi-speed USB or USB2) allows for up to 480Mbps.

A microphone is a device with an electrical output. An acoustic wave is the input. Its only function is to 'capture' sounds and convert them into an electrical signal for processing by the computer.

Wifi is a standard wireless network protocol. There are many different versions, 802.11a 802.11b all the way up to 802.11g (and now theyve skipped several letters & gone straight to 802.11n). A "wifi card" would be an addon card which adds wifi functionality to a computer... The phrase "wifi card" is also sometimes incorrectly used for USB wifi interfaces, even though they arent technically a card.

The generic phrase "PC card" could refer to any of a number of different types of cards. However, it is most often used to refer to PCMCIA type cards, which are addon cards specifically designed for use in notebooks. PCMCIA cards are about the size of a credit card (albeit much thicker) and slide into the PCMCIA slot on a notebook computer. This is preferrable to USB in that PCMCIA cards insert fully (or near fully) into the body of the computer, as opposed to USB addons which usually protrude from the machine & must be removed for travel.

So most likely the phrase "Wifi PC card" refers to a PCMCIA 802.11 wireless network card.

No one person has been given credit for inventing input devices. These have changed over the years, but have always been necessary for getting information into computers.

Replace the power supply. Power supplies are pretty inexpensive and usually range $40-$60 for 400watts. Recommend you replace this as soon as possible. NOTE: the power supply is one of the four components which require a fan as it builds up alot of heat. The other three are processor, video card, and the case itself.

In one GigaByte, or GB, there are 1,000 Mega Bites, or MBs. More acurately, a computer can only count by 2's (base 2). A person counts by tens. One, ten, one hundred, one thousand etc. A computer counts by twos. One, two, four, eight, 16,32,64,128,256,512, 1024. 1024 is so close to 1000 that most people refere to 1K as 1000 when actually it is 1024. there are 1024Mbytes in 1 Gbyte. 1G =1024M, 1M=1024K, 1Kbyte=1024bytes. There are 1000*1000*1000bytes in 1Gbyte(1,000,000,000bytes in 1gigabyte), or more acuratly (1024*1024*1024) or 1,073,741,824bytes in a gigabyte. There are 1024MBytes in 1GB

Because it is an external device connected to the computer that translates user input into output on the screen.

• Sharing system resources requires operating system to ensure that an incorrect program cannot cause other programs to execute incorrectly.
• Provide hardware support to differentiate between at least two modes of operations.
• user mode - Execution done on behalf of a user.
• Monitor mode - Execution done on behalf of operating system.
• Mode bit is added to computer hardware to indicate the current mode : monitor (0) or user (1).

That really depends on what you expect to do. If you only need to run office applications, chat and send email and save a few thousand pictures you will probably do really well with 500GB. If you need to back up other systems on your network or get into serious video editing, you will run out of space fairly quickly.

standard RCA cable harness (the red white and yellow cables) are likely to be used for a DVD Player, you could also use a tv tuner and coaxile cable if you use and RF modulator. ---- Actually this question is referring to question 20, Chapter 10, Guide to Managing & Maintaining Your PC, Sixth Edition by Jean Andrews. The answer is referenced on p438. The answer is the blue port(Line-in) which is also used for Music Synthesizers, a microphone, CD Player or other external device producing sound.

A FD (flashdrive) is a portable data storage device that uses flash memory. A USB port is a port for a USB cable or anything that has USB capabilities, to plug into. For example, a FD normally plugs into a USB port.

Electric currents flowing at higher rates than the material can withstand.

PCI- E, AGP and PCI are the different slots on your motherboard that the graphics card can go into, and different GPUs fit in one of these slots. PCI - E is the fastest port at the moment, so AGP and PCI video cards are declining. All computers have quite a few PCI ports but most modern motherboards have PCI - E ports and not AGP. If you are buying a GPU, you will need to check what ports your motherboard has, so you know it is compatible. SLI is nVidia's dual graphics card system, and only selected motherboards support this. An SLI compatible video card can be used together with another SLI compatible video card in an SLI compatible motherboard.

Power Supplies are usually measured primarily by their wattage. IE, 650 watt, 750 watt, 1000 watt, etc.

This can be misleading, however, as PSUs are divided into many different areas.

First you want a high enough wattage to run your computer, plus some breathing room. Most PSUs run at 75% or less of what they'te 'rated' for. Look for 80 PLUS certifications. This means the PSU is more efficient and provides closer to advertised power.

80 PLUS Certified means it provides 80% of the rating

BRONZE is even more, SILVER higher still, and GOLD means the highest (~95%)

You should generally factor in your CPU's wattage, and your videocard's reccomendations. Most PCs are okay in the 650 watt zone with a dual or triple core CPU and a single videocard. But for quad-cores, or systems with high-end or multiple videocards, 1000 or more watts may be reccomended.

It's also good to go a bit 'above', as power supplies lose 5-10% of their capacity per year (5-25% for non-80PLUS PSUs)

Beyond that, the rest is mostly gimmick and hype and does not make a considerable difference. Make sure it has enough and correct connectors, tho.

160 MB/s

It could be called either a buffer or a wait state.

The original IBM compatible parts used an 8-bit ISA slot. After that, they moved to a 16-bit ISA slot. There were other things like a VESA slot that didn't last for long. Then there were PCI slots (not express), and AGP was a faster video card slot standard. Then PCI-express replaced both PCI and AGP.

It Could be blocking other programes, messing withthe internet connection, or causing Viruses.

A file-server is essentially a computer with a HUGE hard-drive, masses of RAM and one or more super-fast processors - which is connected to all the other computers on the network. It not only stores programs and data, but also communicates with the computers, printers, plotters and other hardware on the network.

storage space, control space, and build space storage space, control space, and build space

Plotters. Any kind of physical movement, like a robotic arm is a form of output, so mechanical things connected to and controlled by computers can be considered as output devices. A modem is both an input and output device.

usb 2.0 is about 40 times faster than usb 1.1

Microphone is a input device because it's plugged in computer. All devices that you plug in computer are input devices.