input devices
KEYBOARD, POINTING DEVICES, READING TOOLS
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keyboard: for entering data, commands, text, numeric data
Examples-standard keyboard, wireless keyboard, and ergonomic keyboard. Ergonomic keyboard places keys at angles that are easier on your arms and hand without changing the order.
pointing devices: for sending commands and positioning the cursor.
Examples-mouse, touchpad, game controllers, and trackpoint
reading tools: allow computers to read marks that represent codes
Examples-
Examples-standard keyboard, wireless keyboard, and ergonomic keyboard. Ergonomic keyboard places keys at angles that are easier on your arms and hand without changing the order.
pointing devices: for sending commands and positioning the cursor.
Examples-mouse, touchpad, game controllers, and trackpoint
reading tools: allow computers to read marks that represent codes
Examples-
- Optical mark readers
- Magnetic ink character readers
- Bar code readers
- Radio frequency identification (RFID) readers
- Scanners and pen scanners
output devices
Watch following video for more info!!!
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color printing
Most printers, like monitors, form images from tiny dots. Most printers mix various amounts of cyan, magenta, yellow, and black pigments to create a color. Monitors can display more colors than printers.
This is the subtractive synthesis using CYMK color model. The combination of colores makes black.
This is the subtractive synthesis using CYMK color model. The combination of colores makes black.
storage devices
![Picture](/uploads/4/9/6/2/49627667/4560665_orig.jpg)
Storage devices, or secondary storage record information so it can be read later. Some examples are:
TAPE DRIVES: Common storage devices on most mainframe computers. It can store massive amounts of information on magnetic tape in a small space at a relatively low cost. Primarily used to back up data.
MAGNETIC DISK: Magnetically coated surface stores encoded information. It provides random access capability, and it retrieves information rapidly. PCs include hard disks as main storage device. Older diskettes (floppy disks) and Zip disks have all but disappeared
OPTICAL DISC DRIVE: Use laser beams to read and write data. It is often used to make backup copies.
characteristics-
•CD-ROM (compact disc—read-only memory) discs – oldest & also identical to those used to store music
•CD-RW drive: Read data from CD-ROMSs; record data onto CD-R and CD-RW discs.
•Rewritable DVD drives: commonplace in PCs
INTERNAL AND EXTERNAL DEVICES:
Hard disk drives and optical disk drives can ve external or internal.
Internal drives: Reside inside casing of computer
External drives:Can be connected through USB or FireWire ports. They are relatively easy to transport between locations, and can be shared between computers
TAPE DRIVES: Common storage devices on most mainframe computers. It can store massive amounts of information on magnetic tape in a small space at a relatively low cost. Primarily used to back up data.
MAGNETIC DISK: Magnetically coated surface stores encoded information. It provides random access capability, and it retrieves information rapidly. PCs include hard disks as main storage device. Older diskettes (floppy disks) and Zip disks have all but disappeared
OPTICAL DISC DRIVE: Use laser beams to read and write data. It is often used to make backup copies.
characteristics-
- Transparent plastic disc surface protects from physical damage – while letting laser light through
- Access speeds are slower than for magnetic disks
- Upper surface is more sensitive to scratching – which leads to deterioration & information loss
•CD-ROM (compact disc—read-only memory) discs – oldest & also identical to those used to store music
•CD-RW drive: Read data from CD-ROMSs; record data onto CD-R and CD-RW discs.
- CD-R (compact disc-recordable) write-once, read-many
- CD-RW (compact disc rewritable) erasable
•Rewritable DVD drives: commonplace in PCs
- can read and write to CD and DVD media
- gradually being replaced by Blu-ray drives
INTERNAL AND EXTERNAL DEVICES:
Hard disk drives and optical disk drives can ve external or internal.
Internal drives: Reside inside casing of computer
External drives:Can be connected through USB or FireWire ports. They are relatively easy to transport between locations, and can be shared between computers