Lesson 2- The Computer Flashcards
A ____ system is made up of various elements.
COMPUTER
Elements of a Computer?
- Input Devices
- Output Devices
- Virtual Reality
- Physical Interaction
- Paper
- Memory
- Processing
Type of Computer(3)?
- Desktop
- Laptop
- PDA (Personal Digital Assistant)
Our first generation of computer uses ____ ?
BATCH PROCESSING
Types of Keyboard?(2)
- QWERTY
- DVORAK
Most common text input device.
KEYBOARD
Text can be input into the computer, using a pen and a digesting tablet.
HANDWRITING RECOGNITION
For entering numbers quickly: ex. Calculator , PC Keyboard.
NUMERIC KEYPADS
Device use for pointing, positioning, and drawing.
MOUSE
2 types of Mouse?
- Mechanical
- Optical
Small touch sensitive tablets. Used mainly in laptop computers
TOUCHPAD
indirect pressure of stick, buttons for selection on top or front like a trigger.
JOYSTICK
for laptop computer. Miniature joystick in the middle of the keyboard.
KEYBOARD NIPPLE
Detect the presence of finger or stylus on the screen.
TOUCH-SENSITIVE SCREEN
Control interface by eye gaze direction.
EYE GAZE
Four keys (up, down, right, left) on keyboard.
Inverted “T”.
CURSOR KEYS
number of pixels on screen.
Resolution
ratio between width and height.
Aspect Ratio
it tells how many different colors for each pixels.
Color Depth
diagonal lines that have discontinuities in due to horizontal raster scan process.
Jaggies
Softens edges by using shades of line color.
Anti-aliasing
Stream of electrons emitted from electron gun, focused and directed by magnetic fields, hit phosphor-coated screen which glows.
Cathode Ray Tube
Thin flexible sheets, updated electronically but retain display.
Digital Paper
Beeps , bongs, clonks, whistles and whirrs.
Used for error indications.
Sounds