Glossary 235RPM — revolutions per minute — The number of rotations that occur per minute.Hard drive speed is often measured in rpm.RTC — real time clock — Battery-powered clock on the system board that keeps thedate and time after you shut down the computer.RTCRST — real-time clock reset — A jumper on the system board of some computersthat can often be used for troubleshooting problems.SSAS — serial attached SCSI — A faster, serial version of the SCSI interface (asopposed to the original SCSI parallel architecture).SATA — serial ATA — A faster, serial version of the ATA (IDE) interface.ScanDisk — A Microsoft utility that checks files, folders, and the hard disk’s surfacefor errors. ScanDisk often runs when you restart the computer after it has stoppedresponding.SCSI — small computer system interface — A high-speed interface used to connectdevices to a computer, such as hard drives, CD drives, printers, and scanners. TheSCSI can connect many devices using a single controller. Each device is accessed by anindividual identification number on the SCSI controller bus.SDRAM — synchronous dynamic random-access memory — A type of DRAM that issynchronized with the optimal clock speed of the processor.serial connector — An I/O port often used to connect devices such as a handhelddigital device or digital camera to your computer.Service Tag — A bar code label on your computer that identifies your computer whenyou access Dell Support at support.dell.com or when you call Dell for customer serviceor technical support.setup program — A program that is used to install and configure hardware andsoftware. The setup.exe or install.exe program comes with most Windows softwarepackages. Setup program differs from system setup.shortcut — An icon that provides quick access to frequently used programs, files,folders, and drives. When you place a shortcut on your Windows desktop and double-click the icon, you can open its corresponding folder or file without having to find itfirst. Shortcut icons do not change the location of files. If you delete a shortcut, theoriginal file is not affected. Also, you can rename a shortcut icon.SIM — Subscriber Identity Module — A SIM card contains a microchip that encryptsvoice and data transmissions. SIM cards can be used in phones or portable computers.
