Flashcards
Chapter 1 Keywords
Flashcards do conjunto (22)
- 1AnalogueAnalogue signals are continually variable and even small fluctuations in the signal are important. Analogue systems use continuous ranges of values to represent information.
- 2DigitalDigital signals have discrete values such as on/off, 1 or 0. In-between values are not used.
- 3Personal Computerse.g. Netbooks, Laptops, Notebook Computers, Palmtops, Desktop Computers, Tablet Computers, PDA's and Handheld Computers.
Used for web searching, email, running applications, e.g. word-processing, spreadsheets, databases, and many other software applications in homes and offices. - 4Mainframe ComputersLarge computers used in banks, insurance firms where very large amounts of data have to be processed quickly.
- 5SupercomputersVery fast computers used in universities and other areas where complex calculations are needed and speed of calculation is important,
- 6HardwareIs all of the physical components that can be touched, held and seen.
- 7SoftwareIs used to 'program' the computer system which means to create a set of instructions, usually stored or saved for later use, that the computer will follow.
- 8InputEntering data into a computer system.
- 9ProcessingData is converted it from one form to another. This is done by following a set of instructions and commands.
- 10OutputWhen the results of processing are shown, this is output.
- 11StorageData is kept or recorded while waiting to be used or for future use.
- 12ModemThis device encodes digital information on to an analogue signal. Often used to send digital data along ordinary telephone lines.
- 13Network interface cardsThis device is often just called a network card or NIC; these provide the electronic circuitry for computers to communicate on a network.
- 14HubThis device connects different networks sections.
- 15Routers and switchesThese devices connect different networks and can be used to control where the data is sent. They are often found in homes and used for connecting to the internet.
- 16USB interfaceThis is used to connect a computer with another device such as a flash memory device.
- 17Main (internal) memoryHolds the data that is currently in use.
- 18Backing storageHolds data for long-term storage.
- 19ROMRead Only Memory is a permanent storage area of memory that does not lose its data when power is turned off. Data can only be read from ROM, not written to it.
- 20RAMRandom Access Memory loses its data when power is turned off. It can be written to as well as read from.
- 21BIOSBasic In Out System is needed to tell the computer what to do on startup.
- 22User interfacesThis is where the user tells the computer what to do or enters data that the computer will use.
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- FlashCards sobre Chapter 1 Keywords, criado por Emma Harrison em 22-04-2016.
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- Emma Harrison
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