Hardware Flashcards
Ergonomic keyboard
A keyboard that seperates the keys into two halves shaped like a wide “V”
Using an ergonomic keyboard puts less stress on the hands and wrists
What does the user’s finger making a keystroke on the virtual keyboard do
Breaks the infrared beam and reflects light back to the projector
Why did optical mice supersede mechanical mice
Because their sealed bottom surfaces do not absorb dust and dirt
What’s a pointing device
Any device used to control the movement of a cursor on a computer screen
Examples of a pointing devices
Touch screen
Touch pad
Trackball
Joystick
Stylus
What is a scanner
A scanner captures images for computer editing and display.
What are high and low resolution scanners used for
High resolution - used for scanning high resolution printing
Lower resolution - adequate for capturing images for computer display
Measurement unit of the resolution of a printed document or digital scan
DPI
Dots per inch
What does a handheld scanner consists of
A light source, a lens and a light sensor that translates optical impulses into electrical ones
What is a MFD
A multi functional device
A machine that can print, copy and scan
Examples of reading devices
Magnetic strip: Reads info from cards like credit cards.
Barcode scanner: Converts barcode images into text.
QR code: Readable by smartphones for quick access to information.
OCR
Optical character recognition scanner
Technology that turns scanned documents, PDFs, or images into editable and searchable text.
What does the monitor resolution describe
The visual dimensions of any given display
What is a refresh rate
The number of times a display’s image is updated
What is the refresh rate expressed in
Hertz
