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Business-Driven Information Technologies Final Exam Notes
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Business driven information technologies notes.Session 1: INTRODUCTION TO INFORMATION TECHNOLOGY IN BUSINESS
The 5 eras of MIS :
- Mainframe & minicomputer
- Personal computer
- Client / server
- Enterprise computing
- Cloud computing
1. The Mainframe era 1965-1975
- Centralized. Big calculators
- Mainly used for accounting
- Terminals connected to mainframe computer
- Start of Ethernet
2. PC revolution 1975-1985
- Start of decentralization
- One device per user
- IBM, Microsoft, Apple
- Not connected yet
3. Client server 1985-1998
- LAN - Decentralization continues
- Enterprise resource systems (ERP)
- Beginning of internet and email
4. Internet 1999-today
- WWW
- Ecommerce
- Search engines
- Ubiquitous computing
5. Web 2.0. Cloud computing today forward
- Web 2.0.: Blogs, social networks
- All services and info in the cloud
- New devices: tablets...
,Session 2: HARDWARE, SOFTWARE & THE VALUE OF INFORMATION
You have to know when information is needed, and should also be able to locate,
evaluate and effectively use that information.
,You can use information in different ways, these are:
- Communication
- Process support
- Decision making
Information is also used by some businesses as a product.
System: A system is a set of components that work together to form a complex.
Basically it takes inputs and processes them to produce outputs.
Business process: It is a set of coordinated activities that lead to a specific goal.
INFORMATION SYSTEM:
An information system is a combination of tech, data, people, and processes that is
directed towards the collection, manipulation, storage,, organization, retrieval and
communication of information.
INFORMATION TECHNOLOGY:
Hardware, software and media used for storage, organization, retrieval and
communication of information.
Information systems help organizations due to:
- information flow
- Process improvements
- Automation
- Control
, There are different types of information systems within a company and also
several ways to classify them:
Hardware components:
- CPU
- Storage
- Input technologies
- Output technologies
MOORE’S law: It is the observation that the number of transistors in a dense
integrated circuit doubles about every two years.
Hardware convergence: It is the tendency for different technological systems
to evolve towards performing similar tasks. A clear example is how a
smartphone can now be a flashlight, a credit card, a gps, and a camera all in
one device.
Software:
- Applications: Cloud based and locally installed
- Mobile: Apps Stores
- Private or open source.
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