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Introduction to Computing (Unit 2. Information Flow (2.3. Communication…
Introduction to Computing
Unit 1. Nature of Information Systems
1.1. Origins of the Information System
About 6000 ago
to. Definition of Information Systems
It is an arrangement of people, activities, data, networks and technology integrated with each other for the purpose of supporting and improving the daily operations of a company.
b. Raw Material of Information Systems
Data is represented by symbols, but can only be considered as information in a very limited sense.
c. Actividades del Sistema de Información
Capture of input data
Manipulación de los Datos
Group
Calculation
Classification
Síntesis
Management of Output Results
Storage and retrieval
Communication and reproduction
d. Information Systems Life Cycle
It is an ordered and systematic set of actions whose purpose is to solve problems
of a company.
Steps for the development of the life cycle of the information system.
Planning
Analysis
Design
Implantation
Support
e. General Diagram of the Information System Life Cycle.
1.2. Advantages of Information Systems.
Mejor Eficiencia:
Best Quality Products:
Best service:
Greater security:
Better Obtaining Information:
1.3. Information Systems Environment
Internal environment:
External environment:
1.4. Information Systems Management
Information system owners:
Users of the information system:
Information systems analyst:
Designers of information systems:
Programmers of the information system:
Unit 2. Information Flow
Depends on several factors:
Who needs the information.
How the information is used.
What level of detail is required.
What format should be used to present the information
Boards
Graphics
Reports
2.1. Elementos de Diagramación.
a. Program Flow Diagram
Entrance exit:
Processing
Terminal
Decision
Connector
Connector out of page
Preparation
Defined process
Annotation
b. Data flow diagram
2.2. Information Flow Logic
a. Program Flow Diagram
Simple selection logic
Selection logic
Cycle logic
2.3. Communication Models
a. Data Communication Techniques
b. Communication Processors
Remote message concentration:
Message switching
Front Processing
c. Data Transmission Channels
Narrow band
Voice band
Broadband
d.
Types of Data Communication Lines
Semi-duplex line
Duplex line
e. Data Communication Network Topologies
Star Networks
Bus networks
Ring nets
f. Data Communication Networks
Real time system
Shared time
Distributed data processing
2.4. Structure of the Information Flow
• It must start from the beginning and end with an end.
• The input and output of information is independent of the process.
• Conditions must have one input and two outputs.
• Information flows must be documented.
Unit 4. Information Management
4.1. Service stations
a. Types of Service Stations
Visual display station
Point of sale station
Silly station
Smart station
4.2. Analysis of the information
a. Properties of the Required Information
Accurate information
Timely information
Complete information
Concise information
b. Information Help
Makes trouble and opportunities more quickly grasped
Allow managers to spend more time on planning
Allows managers to study, in a timely manner, more relationships
complex
Helps to implement decisions
4.3. Information Distribution
a. Using a Data Communication Package
Interactive processing
Batch processing
Combined processing
b. Types of Information Output
Internal output
External output
Film output
Check out by email
Message distribution output
Exit via voicemail
4.4. Techniques and Strategies
a. Choosing an Alternative
b. Control Aspects
Unit 3. Types and Uses of Information
3.1. Databases
a. General Applications of Database Management Packages
b. Components of a Database
Boards
Fields
Records
c. Database Management Package Structures
File handling packages
Relational database management packages
Hierarchical and network database management packages
3.2. Graphic designers
a. Types of Design Packages
• Design packages
Paint packs
Analysis packages
Presentation packages
3.3. Word Processors
a. Word Processing Operations
Create text
Editing texts
Text format specifications
Other operations
3.4. Electronic Spreadsheet