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Search Engine => This is typically a Web site that compiles and indexes a large amount of stuff on the Web and lets you search through it in some orderly manner. Search engines have many different strategies for collecting data and presenting it. If ...
SECC => (Single Edge Cartridge Connector) The SECC is a processor cartridge designed to hold Intel's Pentium II and some external cache. It then plugs into a motherboard that supports Slot 1.
Secure Sockets Layer => (SSL) This is a protocol specified by Netscape that allows for "secure" passage of data. It uses public key encryption, including digital certificates and digital signatures, to pass data between a browser and a server. It is ...
Serial => A means of operation meaning in series, or one after the other.
Serial Port => A data pathway that is usually used to connect modems and mice. Comes in 9- and 25-pin varieties, which are the same.
Server => A machine whose sole purpose is to supply information in its many forms, so that other machines can use it. See also client/server.
SGRAM => (Synchronous Graphics) RAM This is actually a form of SDRAM with some additional features to speed up 3D graphics. It is used on some graphics cards.
Shading => See rendering.
Shadow Mask => A thin sheet of metal with small holes poked through it used to focus the light from the electron beam on most CRT monitors. See also Slot Mask.
Silicon => An element commonly associated with glass. Called silica when bonded with oxygen. Sand and quartz is a form of silica. Not to be confused with "silicone." The main component of computer chips.
SIMM => (Single In-Line Memory Module) Those little memory cards we're used to putting into a computer as memory. It used to be that you needed eight or nine single chips to put into a computer to make a whole memory unit. Now a single card or two is...
SLIP => (Serial Line Internet Protocol) A protocol used to connect your computer to the Internet using serial connection.
Slot 1 => This is a cartridge slot found on motherboards that accepts an SECC cartridge. It works with Intel's Pentium II chips.
Slot Mask => This form of mask is similar to a shadow mask, but instead of a sheet of metal with holes poked into it, it is a series of fine, vertically-aligned metal wires.
SMP => (Symmetric Multi Processing) This refers to a technology where a computer uses multiple processors to process different instructions at the same time, in separate processing units. It is a form of parallel computing.
Socket => Normally, it's where your limbs are attached to, as in "I'm going to rip your arm out of the socket." In network speak, a socket is composed of an IP address and a port number. For example, a socket could be "206.119.148.38 port 80." See al...
Socket 7 => This is a PGA socket designed to accept an Intel P54c or P55c (Pentium class) chip, an AMD K5 chip, or a Cyrix 6x86 chip.
Socket 8 => This PGA socket is designed to accept an Intel Pentium Pro chip.
SOCKS => A protocol for communication through a firewall or proxy server. The SOCKS protocol uses TCP/IP sockets for communication. SOCKS is supported by Navigator and IE and allows them to communicate through proxy servers and firewalls, assuming th...
Sonictron => Viewsonic's answer to Sony's Trinitron. Like Trinitron, it uses an aperture grill instead of a shadow mask.
Sound Card => A peripheral device in the form of a card used for producing sound and music. Although PCs come with a speaker, it does not do a good job of playing music. As for reproducing sound, it takes most of the processor's power to produce only...
Spatial Database => This is simply a database that contains geographical or "spatial" information. For example, you could have a database of population by county in the United States, or amount of sales by state, or amount of employees per site.
Speaker Shielding => The ferro-magnetic shielding around the magnets of speakers that prevents interference with the monitor and stops damage to magnetic media such as floppies, Zip disks, and Jaz disks. Speaker shielding CAN damage MOs or CDs, howev...
Specular Highlights => This allows for the appearance of light reflecting off an object. White or light-colored pixels are blended into darker areas to provide this function.
Spider => Also known as a Web crawler, a robot, Web spider, or sometimes a worm. A program that runs on the Internet, goes out to an URL (Web page), and requests all links that are referred to on that page. Robots learn as they go, building a databas...
SQL => (Structured Query Language) This is a type of relational database that features data in rows and columns. Each row represents a record. Each column is a field. Most serious database solutions today use some form of SQL to store and access larg...
SRAM => (Static Random Access Memory) Much more expensive and physically larger than DRAM, but much faster. The fastest SRAM has a latency of about 5 nanoseconds.
SSD => (Solid State Disk) The D in SSD is really a misnomer. SSD storage is basically a huge block of RAM chips that functions like a hard drive. SSD drives (obviously) are extremely expensive, but offer very high data speeds that are necessary in so...
SSL => see Secure Socket Layer
SSMP => (Simple Screen Management Protocol) This is a communications protocol for text-based terminals.
Star topology => This is a network topology that has network hubs at the center, with all connected computers linked back to the hub by a single cable. Thus, if one cable goes down, the rest of the computers can still communicate.
Stepping => This refers to the version of a chip. Microprocessors typically have many different steppings where performance is increased or minor bugs are fixed. The steppings are generally not touted as a new release of the chip, because chips are n...
Streaming => This term is often used to describe technology that is capable of playing audio or video while it is still downloading. This saves you some waiting.
Superscalar Processor => This term describes a processor that is capable of executing more than one instruction during a processor cycle. Processors can do this by fetching multiple instructions in one cycle, deciding which instructions are independe...
Surge Protector => A specialized outlet that uses capacitors to keep spikes in the power supply from damaging electronic devices.
Swap file => An area of your hard drive that the computer uses for RAM. Although slower, it is usually much more abundant.
Switch => This refers to a hub that directs network packets to the port they are intended for, without broadcasting them to all connections. Switching is an alternative to moving to faster architectures. Switched 10Base-T can move data faster in some...
Sybase => This company makes a SQL database product that competes with Oracle and Microsoft SQL Server. It's also the type of SQL that Microsoft based Microsoft SQL Server on.
Synchronous => Meaning that things happen at the same time. More commonly, used in electronics to signify something occurring at the set pace of a clock, much like a metronome.
System Software => This term can refer to all of the software that comes with a computer system, or more specifically, the operating system. 
T1 => Two pairs of copper wire that carry data at a rate of 1.544 Mbps. T1 lines are used to carry 24 DS-0 signals. They can be used to carry 24 phone lines or an Internet connection capable of 1.544 Mbps data transfer. See also fractional T1.
T3 => 28 T1 lines together make up a T3, which can carry 672 separate voice channels or up to 44.736 Mbps data throughput. Many large Internet providers brag of about having T3 backbones.
T4 => Six T3 lines make up a T4 which carries data at 274 Mbps.
Tag RAM => This is a bank of SRAM that only holds addresses. Tag RAM is used to store addresses so that when the processor makes a call for memory, it first checks to see if the data is in the cache by looking for the memory address in the tag RAM. I...
Tape Drive => A device that can store data on a tape. The advantage of storing data on a tape is that a tape can hold enormous amounts of data in a small and inexpensive package. On the down side, a tape cannot store the data indefinitely, and it is ...
TAPI => (see Telephony API) see Telephony API
TCO => (Total Cost of Ownership) This phrase was coined by the creaters of the Network Computer (NC) to describe the benefits of using a system that is more Mainframe and less Client/Server. Their logic states that NCs, although they may cost the sam...
TCP/IP => (Transmission Control Protocol / Internet Protocol) The TCP/IP suite first saw usage on the original Department of Defense Internet in 1983. Its first implementation was amazingly successful, and it is still THE protocol of the Internet. In...
Technographer => This person types into a computer exactly what a person speaking at a meeting requests of them. The output is displayed on a screen for all to see. The important thing here is that anyone can speak and ask the technographer to type i...
Telephony => This is the science of audio communication through electric devices. It commonly refers to the many pieces of software that will make your $2,000 computer act like a $20 telephone. Of course, you can make this work for you with CTI. With...
Telephony API => (TAPI) This is an API for using telephony functions in Windows. For example, you can include TAPI instructions in your program that can dial numbers, receive calls, and interpret touch-tones.
Telnet => An old protocol for remotely logging in to another computer. It is one of the basic utilities for TCP/IP.
Terabyte => One trillion bytes, or one thousand gigabytes.
Texture Mapping => Pastes saved images, to be used as textures, onto triangle surfaces to improve realism. (Take a picture of a grassy field and code the program to use this picture to fill in your triangles on the floor--you get what looks like gras...
TFT => (Thin Film Transistor) This is a synonym for the Active Matrix display. You'll often see screens referred to as "TFT-Active Matrix," or just "TFT" if they're low on space.
ThickNet => See AUI.
Thin Client => A thin client is similar to a dumb terminal in that it gets all of its information from the network. Some thin clients have their own memory, but lack a hard drive. They're basically stripped down computers that are supposed to lower t...
ThinNet => See 10Base2
Thrash => - To move wildly or violently, without accomplishing anything useful. Also: => Paging or swapping systems that are overloaded waste most of their time moving data into and out of core (rather than performing useful computation) and are ther...
Throughput => Any measure of speed for data transmission.
Toner => Basically, it's ink in dust form. It is specially formulated to be sticky and to melt at a couple hundred degrees.
Toner Cartridge => When referring to laser printers, this is a cartridge that contains toner and the electrostatic drum.
Topology => This refers to the general structure of a network.
Tower Case => An improvement to the standard desktop case, it is flipped 90 degrees to accommodate more inside and to make it more convenient by allowing the case to be placed on the floor instead of the desk.
Trackball => Basically a mouse turned upside down. Instead of moving the whole pointing device, you simply move the ball on top. First seen in arcade games such as Centipede, but now used to replace mice where space is limited.
Transceiver => A device that translates between different network cables but maintains the same network topology. Thus, a transceiver could allow an AUI (Thick => Ethernet) NIC to work with a 10Base-T Ethernet network cable.
Transfer rate => This is the rate at which data is transferred in some amount of bits per second.
Transistor => An electronic device that acts like an electrically activated switch but has no moving parts so it can switch millions of times per second.
Trapezoidal Control => Control on better monitors that allows you to adjust the angles of the borders of the screen.
Trinitron => A technology developed by Sony to enhance the clarity of graphics on their monitors. The way this is done is by making the pixels more square.
True Color => The name given to 16.7 million color representation.
True Parity => This term has come about with the advent of logical parity. It simply means the original parity memory.
Truth table => This is a Boolean table that describes the way that a circuit reacts to input values by showing a complete set of possible input values with corresponding outputs.
Tuple => See n-tuple.
Turbo-Pascal => This is Borland's version of the Pascal programming language.
TWAIN => (Toolkit Without An Interesting Name) This is a standard set for scanners to allow them to have a standard interface to software. This allows the use of your favorite graphics package with your favorite scanner without worrying if one will s...
UART => (Universal Asynchronous Receiver Transmitter) This is a chip that standardized serial communications. Its function is to change a byte into a standard sequence of electrical impulses.
Ultra SCSI => SCSI that communicates twice as fast as standard SCSI-2. Normal Ultra-SCSI transfers data at 20 Mbps, and Wide Ultra-SCSI transfers data at 40 Mbps. Similar to Ultra-IDE, Ultra-SCSI works its magic by transferring data on the up AND the...
UNC => (Universal Naming Convention) This is the name given for the naming used when one specifies: \\the sever\the volume\the path\then the file name of a file. So, a UNC will look like this: \\Myserver\Docdrive\Magazine\glossary.doc
UNIX => A lot like DOS, but a MUCH more powerful operating system. It was developed at Bell Labs and is now being developed by many other corporations. It is mainly used as a multi-user server for mainframes, although companies like Novell offer it f...
UPS => (Uninterruptible Power Supply) This is a device that contains a battery and some circuitry to supply your computer with power for a limited time (depending on the battery) if there is any sort of interruption in the outlet power.
URL => (Universal Resource Locator) This is what is used to give Web addresses for HTML, VRML, WAV and other files. It simply contains the Internet name of the machine containing the data and the path to the file. Much like the UNC, except specifical...
USB => (Universal Serial Bus) A technology in the works that will replace the current way that some peripheral devices connect to your computer. It is much faster than serial and parallel communications. It is also much more flexible: it will be able...
Usenet Newsgroups => Also referred to just as "newsgroups," Usenet newsgroups are a huge bunch of Internet discussion groups that replicate across the Internet every so often. If you get a bunch of people together and request a group for yourself, yo...
V.32 => A standard naming convention used in determining modem communications, all starting with "V." This one is for specifying the Hayes standard of bi-directional 9600 baud transmission.
V.32bis => This is the standard that came after V.32 which increased the speed from 9600 baud to 14.4 KB baud.
V.34 => This is the most recent dramatic improvement of modem communications. It has doubled the speed of the V.32bis standard to 28.8 KB.
V.34+ => This standard was made by US Robotics to indicate that their modems are superior to a standard V.34 modem in that they run at 33.6 KB baud instead of the slower 28.8 KB baud.
V.42 => This is the name given to the standard for transmitting at 2400 baud.
V.42Bis => This is not a speed standard like V.32 and V.34. It is an error correction and compression method that is hardware-based. Its major improvement comes from knowing when compression will be beneficial and when it will not be.
V.Everything => This is US Robotics' designation for their Courier Dual standard modems, which support all types of analog modem communications.
V.Fast => This standard was made between the time of V.32bis and V.34. It is also a 28.8 KB baud speed, but is not as reliable as the approved V.34 standard.
VB => (Visual Basic) This is a software product developed by Microsoft. Its purpose is to bring programming down to a drag-and-drop level to speed up development cycles. In many ways, that goal has been achieved. VB's main competitor is Borland's Del...
Vector => A vector is a set of scalar numbers that refers to a point in space. Say, for example, you are in a two-dimensional space. A vector may be (5,6), which is 5 units across the X axis, and 6 units up the Y axis. See also scalar.
Vector Graphics => As opposed to raster graphics, vector graphics are composed of groups of colored lines. If you've ever seen those old Atari arcade games like Tempest, Battlezone, or Asteroids, that's vector graphics. At one point a company even ma...
Vertical market => This refers to an industry or group of companies that can be marketed to in a similar manner because they have similar needs. Common examples of vertical markets include the government, health care, and insurance.
Vertical Market Application => This is an application written specifically for a particular vertical market, as opposed to more generic multi-purpose applications such as office suites. One example is a program written for the insurance industry that...
Video Card => A device in computers that deals specifically with displaying to a monitor. Without one, you cannot see what's going on in your computer and may have to resort to the ancient method of using a printer as a monitor.
Virtual Memory => A part of your hard drive used to temporarily store what is in RAM. Usually used for little-used items, or when the required RAM is insufficient (since most every computer has more hard drive space than RAM).
Virtual Private Network => (VPN) This is a "virtual" network constructed by connecting computers together over the Internet and encrypting their communications so that other people cannot understand the communications. The benefit is that people can ...
Virus => A program that makes unbidden copies of itself in order to proliferate. Usually plays a role either as graffiti or for malicious intent.
Visitor => When a user arrives on a website, he or she is considered one visitor regardless of how many pages he or she looks at.
Visual C++ => This is a Microsoft product that is basically VB on steroids. It features a similar visual interface with drag-and-drop functionality, but the code is C++, which is more robust than BASIC. It's also much faster when compiled.
VL-bus => (VESA Local bus) This is a 32-bit extension of a 16-bit ISA slot. This architecture predated PCI and allowed users to break the bottleneck that occurred when the ISA bus slowed down graphics speed. It allowed speeds of up to 40 MHz, compare...
VLAN => (virtual LAN) A VLAN is created when a bunch of physically connected ports are grouped together by network hardware that supports VLANs. These VLANs are each treated as completely separate entities and can only be joined together by a router....
VPN => see Virtual Private Network.
VRAM => (Video Random Access Memory) Memory made specifically for video applications (such as a video card). Much faster and more expensive than DRAM.
VRML => (Virtual Reality Markup Language) Virtual Reality Markup Language An enhancement to the HTML format used to make virtual worlds out of Web pages. 
WAN => (Wide Area Network) Any network that spans more than one office, although some say it must span more than one building.
WaveTable => A bit of ROM on newer sound cards that stores standard sounds (as wave files) for instruments instead of generating them from FM sounds. This gives a much more realistic sound to music in games and MIDI files.
WFM => (Wired For Management Baseline) This is an Intel hardware specification that is designed to allow for compliance with easier management of desktop PCs in a networked environment. The specification calls for computers to be compatible with a pr...
White Paper => This is a complete description of a particular technology, from overview to the nitty-gritty details. It is produced by the company that created that technology, as opposed to a FAQ, which can be created by anyone.
Wide SCSI => An improvement to normal SCSI that allows for faster throughput by increasing the number of pins used to connect the drive to the controller from 50 to 68. Wide SCSI doubles the throughput of normal versions of SCSI, but is generally mor...
Windows Sockets => This is an API designed to help inconsistent TCP/IP stacks talk together and be accessed properly by Windows programs.
Wireless-Infrared/Radio Control => Meaning that the device you are using is not connected by cables to the main computer. If you have a radio mouse you don't have a wire connecting the mouse to the computer. Usually , you have a device that connects ...
Wizard => An enhancement to programs that makes them easier to operate by guiding you through, step by step, what is required to achieve your purpose.
WMI => (Windows Management Instrumentation) This is Microsoft's answer to DMI. Apparently, they felt that DMI didn't fully exploit Windows and was therefore incomplete.
WORM => (Write Once Read Many) This is a type of drive/media that allows you to write to it permanently. However, you cannot erase what you've written. CD-R is a form of WORM drive. 
X2 => This is US Robotics 56 Kbps modem standard. It uses the fact that most ISPs are digitally terminated, and this eliminates one analog loop. Due to this fact, digital transmissions can remain more intact than previously, theoretically allowing fo...
X86 => This is the last two digits of the PC CPU type. It originated with the Intel spec of the 8088, which then went to the 8086. Since then, increments have come by changing the first number to 80286 and 80386. The reason that the newer chips are a...
XGA => This started out as IBM's term for a computer monitor resolution standard of 1024 x 768 pixels and 16-bit color. IBM released XGA monitors and graphics cards for their PS/2 computers, but unfortunately, the standard was interlaced and ran on 1...