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Input/Output

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by

Nina Ha

on 14 May 2014

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Transcript of Input/Output

Thank You!
Guidelines
Guidelines
1. Must always have input, process and output.
2. Depict the type of media being used (paper, magnetic, tape, magnetic disks, and terminals)
3. Divide the flowchart into columns and identify internal entity
4. Flowchart logic should flow from top to bottom and from left to right.
5. Keep flowchart on one page. If not use multiple pages and connect the pages with off-page connectors. Such as (image of symbols)

Guidelines
6. Do not directly connect documents within the same column
7. Show a document at both ends of the flow line when crossing organizational lines
8. The only way into a computer data storage unit is through a computer processing rectangle (show symbols)
9. A manual process is not needed to show the sending of a document. Instead we use process flow line

Tutorial Question 1
The flowchart is a symbolic diagram that shows the data flow and sequence of operations in a system. It illustrates elements of a manual system, including accounting records, organizational departments involved and activities that are performed in depts. It is used to represent the relationship between the key elements—input sours, programs, and output products-of computer systems
Tutorial Question 2
Input – new data, data stored for future use or both
Process – the steps performed on the data
Outputs – displayed on a screen, printed on paper, an input to the next process, stored for later use
Storage – magnetic disks, file, magnetic tape
Flow – a line with arrowheads

Question 3,4 & 5 Will be done on excel.
Flowchart
Tutorial 2
Document symbol
A document or report that is prepared by hand or printed by a computer e.g. sales order, purchase order
Multiple copies of one document
Multiple copies of a paper document or report. Must be numbered in the upper, right-hand corner
Journal/Ledger
Can be any output/input on a program flowchart e.g. accounting journals or ledgers
Display
Information displayed by an online output device such as a terminal, monitor, or screen
Online Keying
Represents data entry by an online device such as a terminal or personal computer.
Transmittal Tape
Represents manually prepared control totals, which are to be compared to computer totals for control purposes.
Input/Output
Processing
A process performed by a computer, which usually results in a change in data or information.


Manual Operation
A processing operation that is performed manually.
Auxiliary Operation
A processing operation carried out by a device other than a computer, e.g., an optical character scanner.
Off-line Keying Operation
An operation that uses an off-line keying device, such as a cash register or keying to a disk.
Storage
Magnetic Disk/Drive
Data stored on a magnetic disk or drive.
Magnetic Tape
Data stored on a magnetic tape.
Sometimes represents transaction files

File
A file of documents that are manually stored and retrieved.
Letter indicates the ordering sequence: A = Alphabetic order
D = Date order
N = Numeric order

Document or Processing Flow
The direction of processing or document flow,
Normal flow is top to bottom and left to right.
Communication link
The transmission of data from one location to another via communication lines
On-page connector
Connects processing from one location to another on the same page. Used to avoid crisscrossing lines.
Off-page Connector
Connects the processing flow between two different pages.
Signals the exit from one page and the corresponding entrance on another page.
Terminal
The beginning, end, or a point of interruption in a process or program.
Also used to indicate an external party

Annotation
Provides for the addition of descriptive comments or explanatory notes as clarification.
Flow Symbol
Computer Processing
Full transcript