WEEK 2 Flashcards
Why learn about hardware? (2)
- Hardware can improve productivity, increase revenue, reduce costs, and provide better service
- Managers are expected to know about hardware
Why are Managers expected to know about hardware? (2)
– To help define business needs
– To ask questions and evaluate options when buying equipment
• Choosing the right computer hardware requires understanding its _________to the_________and needs of the organization (2)
relationship & information system
Hardware objectives ______________________________, the information system and the current and future needs of the organization
subordinate to, but supportive of
- Central processing unit (CPU)
- Primary memory: holds program instructions and data for processing
- Secondary storage: more permanent storage
- Input and output devices
- Communications devices
Hardware Components
CPU and Computer Architecture. bits? (2)
- 32 bits
* 64 bits
Memory Characteristics and Functions: Types of Memory
− Temporary
− Volatile
Random access memory (RAM)
− Usually nonvolatile
• Read-only memory (ROM)
simultaneous execution of two or more instructions
• Multiprocessing
shares workload among two or more independent processors in a single computer
Multicore microprocessor
links several processors to operate at the same time, or in parallel
Parallel processing
collection of computers working to solve a common problem
Grid computing
Secondary Storage and Input and Output Devices
− Also called permanent storage
− Nonvolatile
− Greater capacity and greater economy than memory
Secondary storage
- Fast access
- No moving part
- Works like a portable flash drive
Solid State Drive
redundant array of independent disks
Stores extra bits so that data can be reconstructed if system fails
Common for servers
RAID
storage area network
Provides high-speed connections between data storage devices and computers over a network
For multiple servers
SAN
− Direct access optical disc, e.g., CD-ROM
Optical disks
− Stores several gigabytes of data
Digital video disk (DVD)
− stores 5 times more than DVD
Blu-Ray
− Nonvolatile silicon computer chip
Flash memory
INPUT DEVICES
- Keyboard, mouse
Personal computer input devices
INPUT DEVICES
− Input devices that recognize human speech
Speech-recognition technology
INPUT DEVICES
− Input device used with PC to record/store images in digital form
Digital cameras
INPUT DEVICES
− Allow display screens to act as input devices as well as output devices (ex. smartphone screens)
Touch-sensitive screens
INPUT DEVICES
− Employs a laser scanner to read a bar-coded label
Bar-code scanners
INPUT DEVICES
− Activate a command, enter handwritten notes, and draw objects
Pen input devices
INPUT DEVICES
− Employs a microchip with an antenna to broadcast its unique identifier and location to a receiver
Radio Frequency Identification (RFID)
INPUT DEVICES
Voice, face, touch, etc.
Biometrics
Output Devices
− Output quality measured by number of pixels and dot pitch
Display monitors (CRTs)
Output Devices
− Easier on eyes, use less electricity, take up less space than CRTs
Liquid crystal displays (LCD)
− emits light
Light-Emitting Diode (LED)
Printers and plotters: hard copy output
laser, inkjet
Printers
used for general design work
Plotters
