ITM Chapter 2.doc

7 Pages
Unlock Document

Information Technology Management
ITM 102
Ross Mc Naughton

Chapter 2 - Technology Essentials IT Allows you to... - communicate - enables transactions - obtain, organize, analyze, and store data and information - provide entertainment Components of IT - accepting and storing information - performing mathematical calculations - applying logic to make decisions - retrieving, displaying, and sending information - consistently repeating the above actions many times Three Categories 1. Hardware - the electronic and mechanical components that you can see and touch 2. Software - the set of instructions that direct the hardware 3. Network - increases their power by allowing users to share resources, including hardware, soft- ware, and information - These three basic categories together create a platform. Hardware - Processing Hardware - directs the execution of instructions and the transformation of data using tran- sistors (an electric switch that can be either on or off) - a tiny chip made up of transistors is called a microprocessor - this chip contains most of the components that make up the central processing unit (CPU) - computer speed is called the clock speed and is measure in megahertz (MHz), millions of cycles per second and gigahertz (GHz), billions of cycles per second - Computer hierarchy categorizes processors according to their power Chapter 2 - Technology Essentials - Embedded processors are programmable chips built into products to make them “smart” eg. DSPs - Memory - memory temporarily locates data and instructions before processing. - long-term memory helps you keep track of facts - short-term memory is only for items that you need to remember for a relatively short time - computers have long-term memory (ROM) and short-term memory (RAM) stored on chips - Capacity of memory devices range from thousands (KB), millions (MB), billions (GB) - Read only memory contains instructions and data that only special devices can alter - Random access memory stores data only until they are no longer needed, or until you shut down the computer - Input Hardware - provides the interface used for data entry into a device. - Output Hardware - provides the interface used to retrieve information from a device - Storage Hardware - stores data, information, and instructions for the long term. - Communications Hardware - connects one IT device to another - Network Interface card (NIC) provides the physical connection between a com- puter and a local network - Modems, both wired and wireless, allow you to connect to a remote network over a telecommunications line, such as the telephone or cable TV service - Modem speeds are measured in bits per second (bps) Software - System Software Chapter 2 - Technology Essentials - includes any software required to control the hardware components and to sup- port the execution of application software - operating system (OS) software coordinates and handles the details of working with the computer hardware - manages the hardware and software resources of the computer - provides a stable and consistent interface between application programs and the hardware - utility software provides additional tools that you can use to maintain and ser- vice your system ← - Application Software - a complete, self-contained program or set of programs for performing a specific job - productivity software is an important group of application software for business professionals - document preparation software - electronic spreadsheet software - presentation graphic software - database management system (DBMS) - personal information management (PIM) - Middleware - is a software that is more common in enterprises - purpose is to link applications that use dissimilar software or hardware platforms and act like a specialized messenger/translator to manage the exchange of in- formation - Open Source Software - is software that can be used, modified, improved, and redistributed - usually developed by a community of developers that are interested in the sub- ject matter of the software and want to share their work with others - free or at a very low cost Connecting Over Networks - consists of nodes that represent computer hardware and the network users - requires four primary components: - data (the resource) that computers share on the network Chapter 2 - Technology Essentials - special hardware - software that allows computers to communicate and share the data - communication media to link the computers together - Network Categories - two extreme sizes are local area network (LAN) and wide area net
More Less

Related notes for ITM 102

Log In


Join OneClass

Access over 10 million pages of study
documents for 1.3 million courses.

Sign up

Join to view


By registering, I agree to the Terms and Privacy Policies
Already have an account?
Just a few more details

So we can recommend you notes for your school.

Reset Password

Please enter below the email address you registered with and we will send you a link to reset your password.

Add your courses

Get notes from the top students in your class.