Lecture 2 Flashcards
collection of raw facts, numbers, letters, symbols, or any combination of these that, when arranged, provide a result
data
data that is made meaningful based on the needs of the user through manipulation
information
information in computer terms
processed data
describable qualities of information
- relevant
- complete
- timely
- accurate
- presentable
- cost-effective
must be important to the person receiving or using it
relevant
no vital information should be omitted
complete
information must be available when needed
timely
validity or information is necessary for sound-decision making
accurate
good presentation makes information more understandable
presentable
only essential data processing should be carried out
cost effective
conceptual framework where input data is processed resulting in an output in the form of information
input-process-output model (IPO)
series of activities that transforms data into information in some way since men have been able to communciate
data processing
data processing methods
- manual data processing
- mechanical data processing
- electromechanical data processing
objectives of data processing
data processing model
implies the extended use of human labor in the processing of data
manual data processing
involves the use of machines or devices that alter transmit and direct applied forces
mechanical data processing
has proven superior capacity to perform computations and other functions at incredible speeds
electromechanical data processing
four basic functions
- input preparation
- processing
- output preparation
- storage and feedback
source documents are collected into a form acceptable for digital processing
input preparation
actual operations are performed on data to convert it into information
processing
processed information is prepared in a format acceptable to the user for analysis or as an input for a second cycle
output preparation
result of the processed data is stored for future use or retrieval
storage and feedback
digital electronic device that processes data through a series of commands into information for reproduction and storage
computer
machine or electronic circuit designed to work on numerical data represented by some physical quantity
analog computers
processes information in digital form
digital computer
aka nanotech; manipulation of matter on an atomic and molecular scale
nanotechnology
capabilities of computers
- perform arithmetic and logical operations
- store or remember a great amount and variety of information and retrieve or recall the information needed almost instantly
- handle large volumes of repetitive tasks accurately over long periods of time
- communicate with its operators and other machines
- remote processing
limitations of computers
- still subject to human direction and control
- can detect but generally cannot correct an inaccurate entry on their own
- subject to occasional breakdown or computer malfunctions
computer system components
- dataware
- hardware
- software
- peopleware
systematically and organized collection of data and procedures relevant to the organization
dataware
includes the physical components of a computer
hardware