Electronics Dictionary

Electronics Dictionary - Category S

 
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Schematic - A drawing or diagram of an electrical circuit.

SCSI - Small Computer System Interface. Pronounced "scuzzy".

SDRAM - Synchronous Dynamic Random Access Memory. System memory with bus speeds of 66, 100 and 133 MHz.

Seek Time - How long it takes a hard drive to find a specific track on the platter.

Segments - Parts of a large network split off by means of routers or bridges.

Semiconductor - A special substance which has electrical conductivity and insulating properties. Properties increase with temperature increase.

SEO - Search Engine Optimization. A term that refers to making a web site "spider friendly". Here is an article about SEO.

SGRAM - Synchronous Graphics Random Access Memory. A popular type of memory used in video cards.

Shareware - Software that allows you to temporarily try it out for a set time period. Sometimes with limited functionality. After the time period is up, you must delete or purchase the software.

Sideloading - The process of downloading data to a computer from a hard line internet connection then loading the data to a secondary device. A good example of this is downloading songs to a computer and then loading to an iPod. The benefit of loading data this way is speed and management of data through software.

Siemens - Unit of measure for AC admittance.

Signaling - The process of sending data over any type of media.

SIM Card - Subscriber Identity Module. This small chip inserts into your cell phone to store personal information such as phone numbers and address book entries.

SIMM - Single Inline Memory Module. An older type of memory chip design (package type). Most commonly found in 30 pin and 72 pin configurations.

SIP - Session Initiation Protocol. A telephone service that eliminates the need to be routed through the telephone companies computer, thereby reducing calling costs. Here is some detailed information about SIP technology.

Skew - For satellite tv dish pointing, this term refers to rotating the satellite tv dish to a desired angle imprinted on the satellite dish. Once it is set, leave it be. No further adjustment is required.

SLIP - Serial Line Internet Protocol. A method of sending IP packets over dial-up connections.

Smart Card - A credit card with a small computer chip built into the card. Cards are being tested by major companies such as Visa. The smart cards are used for things such as fingerprint recognition to access network resources.

SMS - Short Message Service. Protocol for cell phone ' texting '. Here is detailed info about SMS.

SMTP -  Simple Mail Transfer Protocol.

S/N - Signal to Noise Ratio.

Snoopware - Malicious software (malware) that targets a cell phone. The "virus" is obtained through SMS (short message service) or MMS (multimedia messaging service).

Solenoid - An electrical coil that has a movable plunger.

SORIMM - Small Outline Rambus Inline Memory Module. A smaller version of RIMM memory chips.

Spamming - Any unnatural effort to attract e-business or better search engine placement.

Spider - An internet bot that indexes web sites into a database for search engines.

Spike - A sudden surge in electrical voltage. Usually just lasts one or two seconds but can cause tremendous damage to electronics,

Spool - Print requests are stored on a hard disk before printing.

Spyware - A software program, with malicious intent, that sends data about what you do on your computer to the creator of the program. Click here for an article about spyware.

SSD -  Solid State Disk. Click here for more information about SSDs

SSL - Secure Sockets Layer

Star Topology - A network layout where the cables come from a central location, connected by a hub, to the computers on the network

Start Bit - Signals the beginning of a data packet transmission.

Stator - The stationary part of an electric motor.

Stealth Virus - A virus program that attempts to hide from virus detection software.

Stop Bit - Signals the end of a data packet transmission.

Superconductivity - A lack of resistance in metals at absolute zero temperature.

Surface Computer - A new type of pc that works by the user touching and moving objects on the screen. More than one person at a time can operate the computer. It also recognizes and interacts with objects placed on to it. For example, a cell phone placed on the screen would allow pictures and data to be downloaded. The initial surface computers from Microsoft will use the Windows Vista operating system. This computer shows the most interest in the gambling arena (i.e. - card games).

Surge protector - Sometimes referred to as a power strip. Do not attempt to operate any expensive electronics equipment without this cheap item. If you do not have one, take $10 and go to Wal Mart and get you one. You will thank us later. If you have the money, get a UPS. Here is an article about power surges and UPS.

S-Video - Split video. A type of television connection that offers superior picture quality.

Switching - Allows data to be transmitted through an independent network path. Avoids collisions of network transmissions.

Switching Power Supply - A power supply for electronics (namely computers with their related hardware devices) that converts AC voltage to DC voltage for use in electronics components. They come in two flavors - 1) Power Factor Corrected and 2) Capacitor Input. PFC's are used in high end computer systems (such as servers, drive arrays, and routers). CI's are used in small end user PC systems.

Sync - Abbreviation for synchronizing.

Synchronous Data Transmission -  A transmission technique that uses a clock to control the timing of data being sent.

Synchronous Speed - Maximum speed for an AC motor.

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