Inf Flashcards
Data
words, numbers, images, sounds etc without context. (raw fact.) (40s , 7:30 , 37,50€)
Information -
a collection of words, numbers, images, sounds etc put into context, i.e. to
give them meaning. Example: I start teaching at 7:30 today.
RESULT
Data put into context becomes information.
ICT
is technology that supports activities involving information
activities include gathering, processing, storing and presenting data
hardware
the physical parts of the computer
software
term for programs that control and make use of the hardware
Types of software
Firmware - a program embedded onto a hardware device
An operating system (OS) - a platform that gives the user an interface to the hardware
Software applications( also called an application or ‘app’) -not essential
Central Processing Unit (CPU)
Hertz (Hz) - the ‘brain’ of the computer
is the device that carries out software instructions
Main Memory (RAM)
- part of the computer that temporarily stores the instructions that the computer is running, and the data it is processing
- volatile storage device (means that if the computer’s power is turned off the contents of RAM disappear and are lost)
Read-Only Memory (ROM)
- used in most computers to hold a small, special piece of software: the ‘boot up’ program (the BIOS (Basic Input Output System))
-it runs when the computer is switched on or ‘boots up’
-non-volatile storage (means that the data it contains is never lost, even if the power is switched off)
Peripheral Devices (Peripheral means ‘around’)
- all the extra devices
Input Devices
- they pass data into the computer.
(A keyboard, a mouse and a webcam are all examples of input devices.)
Output Devices
- they take data from the computer (A monitor, a printer and a loudspeaker)
They take information from the computer and convert it into real world things (images, paper hardcopy, sound).
Secondary / Backing Storage
name for all of the devices (apart from ROM and RAM) that can store data in a computer system
(A hard drive, a CD-ROM, a floppy disc and a USB memory stick)
Informatics
- 1957 / info+math
the study of behavior and structure of any system that represents, store, processes, generated 0,1