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100BaseT => This is an extension of 10BaseT that runs at 10 times the speed. It's theoretically capable of 100 Mbpstransmission speed. The drawback for some installations is that it requires more expensive Category 5 cable to run at highspeeds, where...
10Base2 => Refers to a type of Ethernet cable that has been largely phased out. It's also known as "thin net." Cable speedsare typically up to 10 Mbps. 
10BaseT  => This is a type of Ethernet cable topology that uses RJ-45 connectors and a star topology. It's also known as"twisted pair." Transmission speed is 10 Mbps. 
128-bit Operating Systems => Operating systems may eventually be 128-bit. The ability to address 128 bits of memory spaceis something that may be necessary for huge databases, and will speed up operations. Of course, this will not happen untilafter t...
128-bit Video Cards => At one time they claimed to be the fastest out there. 128-bit cards natively address 4 MB of memory,but most have been kludged so that they can run with 2 MB of memory. The makers of these cards are going on theprinciple that a...
1394 IEEE standard => See Firewire. 
16-bit Operating Systems => DOS and Windows 3.x are 16-bit operating systems. They are limited in complexity and sufferinstability and slow speed (compared to 32-bit OSs) when run on 32- and 64-bit processors like the 386DX compatible chipsand above....
2-tier architecture => This term refers to applications that have a code base (1-tier) separate from the database managementsystem (1-tier), such as using Delphi to interact with Microsoft SQL Server (1+1 = 2 tier), for example. The application coder...
3-tier architecture => This architecture splits the user interface from the application logic. The server handles the databasemanagement and application logic. This works out to less complexity at the client and a more scalable application.Additional...
32-bit Chips => (32-bit processor) see 32-bit processor 
32-bit color depth => Anything that supports 32-bit color supports over 4 billion different colors. Generally, graphics cardssupport up to only 24-bit color because the human eye cannot discern between colors at that level, and you need a lot ofmemor...
32-bit Memory Chips => 72-pin SIMMs are 32-bit memory chips. 
32-bit Operating Systems => Windows NT, OS/2, and some flavors of UNIX are 32-bit operating systems. Windows 95 is a32-bit operating system running on top of a 16-bit operating system (DOS). 
32-bit processor => This type of processor can run a 32-bit OS, such as Windows NT or some versions of UNIX. You can alsorun a 16-bit or lesser OS, but performance is not optimal. Intel's 386DX, 486, Pentium, and Pentium II are all 32-bitprocessors. ...
32-bit Video Cards => These are generally older cards that were only capable of addressing 1 MB of RAM. 
56Kflex => This is one of the two competing 56 Kbps modem standards. It was developed by Rockwell and Lucent and hasmore market share than USR's X2 technology due to the fact that it is licensed to over 700 modem manufacturers. 
64-bit Chips => (see 64-bit processor) see 64-bit processor 
64-bit Memory Chips => DIMMs are 64-bit memory chips. 
64-bit Operating Systems => Some flavors of UNIX are 64-bit operating systems designed to run on 64-bit chips. There areplans to port Windows NT to 64 bits so that it can run on the P7. 
64-bit processor => This describes a processor that can run a 64-bit OS. The DEC Alpha is 64-bit, and Intel's Merced will be a64-bit processor. The 386, 486 and Pentium and Pentium II are all 32-bit processors, even though the Pentium has a 64-bitmem...
64-bit Video Cards => Most current video cards have a 64-bit bus with their memory on them. 64-bit cards must have at least 2MB (or multiples of 2) of memory. 
8 bits => Make up 1 byte. 
8-bit Memory Chips => 30-pin SIMMs are 8-bit memory chips. If you want to use them with a 32-bit chip such as a 386 or a486 you need to put four of them in at a time.
Access Speed => This refers to the average amount of time it takes for a floppy  drive, hard drive, CD drive or other drive to find any particular piece of data on a disk.
Accuracy => Accuracy is how close to the actual value you are. For example, if the number you are representing is 4 and you say it's 3, you are inaccurate by 1.
Accuracy/Precision => If the actual value is 4.321 and you say that it is 4.30, then you are precise to 3 places but inaccurate by .021. If a value is represented as a bullseye on a target, a group of guesses or measurements represented by closely gr...
ACPI => (Advanced Configuration and Power Interface) This power management interface takes the power management out of the BIOS and gives control to the OS. Typically, a system's BIOS is only able to turn a device off after a certain period of inacti...
Active Matrix => LCD panels that are active matrix have a sharper, brighter image than those with passive matrix screens. They can also continue to be seen at much greater angles off of central viewing.
Active Movie => This is a Microsoft technology used for streaming video and audio over the Internet. It is an ActiveX control.
Active Server Pages => (ASP) Microsoft created this technology and bundled it with their IIS Web server. It is designed to allow easy combination of HTML, scripts (such as Javascript and Microsoft's VBScript), and ActiveX. Active Server Pages promise...
ActiveX => Microsoft technology designed to enable easier multimedia on the Web. ActiveX controls can be used in Java to create multimedia effects. For now, that means that when you go to Web sites, buttons can light up and sound effects can play whe...
ADSL => (Asynchronous Digital Subscriber Line) This is a new technology just starting to come out that is the phone company's answer to cable modems. It supports data speeds over 2 Mbps downstream (to the user) and slower speeds upstream (to the Inte...
AGP => (Accelerated Graphics Port) This is a special port that will begin to show up on motherboards in the second half of 1997. The port will bypass the PCI bus and allow much higher throughput from the graphics card to the processor for speedier 3D...
Alpha Blending => This allows two objects to be blended together. This is primarily used for atmospheric and environmental effects. It allows such things as "fogging," where an image is rendered behind a "translucent" image, which creates the effect ...
Analog => Analog refers to a representation of a quantity that varies over any continuous range of values. Analog signals can be thought of as pure in nature and not processed. Thus, the debate over whether record albums (analog representation of sou...
Analog Control => An analog control changes value in non-discrete steps. You can tune an analog control to non-distinct values. In some cases, like for volume, analog controls are better. Have you ever used a digital volume control on a new TV, and o...
ANSI => (American National Standards Institution) This organization represents the United States in the ISO (International Organization for Standardization). They work to develop coding and signaling standards.
Anti-Aliasing => This is a method used to better define higher resolution objects in lower resolution. For example, you would use anti-aliasing if you have two lines that are so close together that at 320 x 200 they look as if they are one double-wid...
Aperture Grill => See Slot Mask.
API => (Application Programming Interface) APIs allow you to program to a pre-constructed interface (the API) instead of programming a device or piece of software directly. This allows for faster development, since programming to a device's API is de...
Argument => This is what you have with your girlfriend when she wants you to stop using your computer so much. Actually, argument refers to the value you call a procedure with. For example, if you wrote a line of code that said "goto 140," telling yo...
ASIC => (Application-specific Integrated Circuit) An ASIC is a circuit designed for a very specific purpose, such as the processors in PDAs or the chips on a motherboard chipset. ASICs contrast with more general-purpose devices such as memory chips o...
Aspect Ratio => This is the ratio of the width by the height on a monitor or television screen. Most TVs and monitors have a 4 x 3 aspect ratio. The screens are 4 units wide and 3 units high. A movie screen has an aspect ratio of 16 x 9 (about 5 x 3)...
Asynchronous Communication => This method of transferring data does so without a specific timing mechanism between the two communicating parties. The party receiving data isn't expecting more data at any set interval.
ATA => (AT Attachment) More commonly known as IDE, the "AT" refers to the IBM-AT computer where this interface was first used.
ATA-33 => An extension to the ATA interface (IDE) that will effectively double the top data transfer speed up to 33 Mbps. Also known as Ultra-IDE.
ATM => (Asynchronous Transfer Mode) A networking protocol designed to move multimedia data around with high reliability and speed. Some ISPs use ATM as the protocol for their backbones.
ATX Form Factor => The ATX form factor specification takes the original baby AT-sized motherboard, rotates it 90 degrees, and calls for a power supply with a side-mounted fan that cools not only the power supply, but also the processor and add-in boa...
AUI => This is a synonym for the 10Base-5 Thicknet Ethernet standard.
Availability => This is a measure of how much time a network or a connection is running. Generally, the equation is: Time Running / Time Measured (time running divided by time measured). Thus, if you measured something for 20 minutes, and it was only...
Backbone => A segment of a network that's often a higher speed than therest of the network and connects all the other segments. If you don'thave a fast backbone, your network will lag. That's why a lot of ISPs areconstantly restructuring their backbo...
Bandwidth => This is a measure, in some amount of bits per second, of theamount of data that can be sent over a particular cable, interface, orbus.
BASIC => (Beginner's All-purpose Symbolic Instruction Code) Thisprogramming language was developed in the mid '60s. The language wasconstructed of simple English-like commands that were run through aninterpreter, line by line, each time the program w...
Batch => A group of commands that are executed one at a time. Same asscript.
Baud => The measure of how frequently sound changes on a phone line. Thisused to be the measure of speed of modems because they worked by bruteforce and actually made a sound for each bit of information. Now, modemswork on a more sophisticated level....
Bilinear and Trilinear Filtering => This is used to smooth flat surfacesby averaging the colors of adjacent pixels, which blurs them and removesblockiness when viewed up close.
Binary code => Binary consists of a string of bits, i.e. 01010111000000001
BIOS => (Basic Input Output System) This makes your computer speak thesame language as every other computer, making accessing video and thekeyboard standard.
Bit => This is the smallest unit of measure in a computer. It isrepresented by a 0 (off) or 1 (on). You can think of a bit as a switch.If it's in the on position, it's a 1, and if the switch is off, it's a 0.All parts of your computer communicate in ...
Bit depth => How many bits it takes to represent the color in one pixel.The larger the bit depth, the more colors you can display and the morepower it takes to display.
Black box => Anything that you put input into and get output from, butdon't know what's inside or how it works.BLOB (Binary Large OBject) => A BLOB is a data type used in a relationaldatabase that can contain any type of binary data, including sound,...
Boolean logic => This is the form of logic where every answer is eithertrue or false. Alternately, you can think of it as either 0 or 1, where 0= false and 1 = true.
Boot => This is a verb meaning to load. You can say thatyou are booting your machine, or that your operating system is bootingup.
BPS => (bits per second) This is generally a measure of how fast somedevice communicates, usually in thousands of bits per second (Kbps) ormillions of bits per second (Mbps).
Bridge => Bridges link two or more network segments that use the samenetwork technology. The network topologies do not have to be the same,i.e. you can bridge Ethernet and Token Ring. If the protocols are not thesame on segments, then you've got a ro...
Browser => Most commonly used to refer to a software program used to lookat World Wide Web pages.
Bug => This is commonly an error in design or programming in a hardwaredevice or piece of software. The effects of a bug may be as harmless asan extra graphic on the screen, or as harmful as a system crash or lossof data. See also Feature.
Bus => A bus is simply a data path between devices. The computer's systembus is what peripherals use to send and receive data from the processorand main memory.
Bus mouse => A mouse that uses the smaller 6-pin connector instead of yourcomputer's serial port. Also referred to as a PS/2 mouse because of itsearly adoption by the IBM PS/2 series of computers.
Bus speed => This is a measurement, usually in MHz, of how many times datacan be transferred over the bus per second.
Bus Topology => This network topology has computers connected to a strandof network cabling that is connected to network repeaters at one end andterminated at the other. If you break part of the cable or remove theterminator, all machines on that seg...
Byte => Simply put, it's 8 bits. Think of it as a string of 1s and 0s thatrepresents a number from 0 to 255. For example '01100101' is one byte ofinformation.
C => This is a programming language developed in the late '70s. It became hugely popular due to the development of UNIX, which was written almost entirely in C. C was written by programmers for programmers and it lets you write code in sloppy ways th...
C++ => This is an extension of the C programming language that adds object-oriented concepts.
Cable Modem => Cable companies are working to provide Internet access over coaxial cable. That's right, the cable that you plug into your VCR or TV. A cable modem accepts this coaxial cable and can get data from the Internet at up to and above 1.5 Mb...
Cache memory => Generally a small chunk of fast memory that sits between either 1) a smaller, faster chunk of memory and a bigger, slower chunk of memory, or 2) a processor and a bigger, slower chunk of memory. This is to provide a bridge from someth...
Cat 3, 4, 5 => See Category 3, 4, or 5 cable standards.
Category 3 cable standard => Cat 3 cable is certified to run at up to 16 MHz. You can achieve speeds of up to 10 Mbps on Cat 3 cable. This cable maxes out with standard 10 Mbps Ethernet.
Category 4 cable standard => Cat 4 cable is certified to run at up to 20 MHz. You can achieve speeds of up to 16 Mbps, such as with the 16 Mbps token-ring standard.
Category 5 cable standard => This is the latest and greatest copper wire standard. It uses an RJ-45 plug like Cat 3, and 4, and 4-pair wire, but it is certified to run up to 100 MHz and is suitable for 100 Mbps wiring standards. The guys that wired u...
CAV => (Constant Angular Velocity) This refers to a spinning disk. As data is read from the disk, the drive motor spins at the same speed. For example, CD-drives that work at CAV will read data at 12x towards the center and 20x towards the edge, wher...
CD-R => (Compact Disk Recordable) CD-R drives will record up to 650 MB of data onto specialized CD-R media. The media is expensive compared to the mass-produced CDs that software is generally distributed on, but cheap for the amount of data you can s...
CD-ROM => (Compact Disk Read Only Media) CD-ROM media is read-only media that holds 650 MB of data. It's generally accepted as the easiest way to distribute software. CD-ROM drives can also read music CDs even though they are in a different format th...
CGI => (Common Gateway Interface) This interface allows scripts or programs to run on a Web server. All Web servers support CGI scripting. You can make a CGI script do pretty much anything a computer program can. Most commonly, they are implemented t...
Channel => This refers to the group of resellers that supply most companies with software, hardware, and support. The channel is a force to be reckoned with, and it competes directly against companies like Gateway 2000 and Dell. A channel can also be...
CIR => (Committed Information Rate) This term is used by ISPs to represent an amount of data that you should, on the average, be able to draw through your connection to them. This is measured in kilobits or megabits per second.
CISC => (Complex Instruction Set Computer) Intel x86 chips are CISC chips because of the complexity of the instruction set. On the other side of the coin, you have RISC chips that use a reduced instruction set. RISC chips split big operations into lo...
Client/Server => Client server technology came about when computers began to cost less. Mainframes are very expensive, and didn't give users much personal freedom. The client/server model promised to change that scenario and it's much more popular to...
Clock chipping => Synonym for over-clocking.