Database Management Systems
What are some popular database management systems (DBMSs)?
What is a data dictionary
Contains data about each file in database and each field within those files
What is a query?
Request for specific
Components and Types of Computers
What is computer literacy (digital literacy)?
Current knowledge and understanding of computers and their uses
What is a Computer?
Hardware advice that accepts data
Electronic device operating under the control of instruct
Utility Program Operations
Operating System Utility Programs
What is a disk scanner?
Searches for and removes unnecessary files
Windows vista includes Disk Cleanup
What is a disk defragmenter?
Reorganizes files and unused space on hard disk so that progra
Networks from Computer Communication
What is a local area network (LAN) and a metropolitan area network (MAN)?
A LAN is a network in limited geographical area such as home or office building
Wireless LAN (WLAN)
Metropolitan area network (MAN) con
Networks and Computer Software
Networks and the Internet
What is a network?
Collection of computers and devices connected together, often wirelessly
Used to share
Resources; hardware devices; software programs; data; information
What is a server?
Relational, Object-Oriented, and Multidimensional Databases
What is a data model?
Rules and standards that define how database organizes data
Defines how users view organization of data
Four popular data models
Maintaining Data and Moving into Databases
Data and information
What is a database?
Collection of data organized so you can access, retrieve, and use it
Database software also called database management system (DBMS)
Database allows you to
Introduction of Internet
What are some services found on the Internet
History of the Internet
How did the internet originate?
Networking project by pentagons advanced research projects agency (ARPA
Computer Processors and Data Representation
What is parallel processing?
Using multiple processors simultaneously to execute a program faster
Requires special software to divide problem and bring results together
How do compu
Computer Memory and Accessories
What is memory?
Electronic components that store instructions, data, and results
Consists of one or more chips on motherboard or other circuit board
Each byte stored in unique location called an address, similar to s
What is communications software?
Programs that help users establish connection to internet, other network, or another
Programs that help users manage transmission of data, instructions, and information
Programs that provid
What is needed for successful communications
Sending deviceinitiates instructions to transmit data, instructions, or information
Communications deviceconnects the sending device to the communications channel
Application and Business Software
What is application software?
Programs designed to make users more productive and/or assist them with personal tasks
How is software distributed
Packaged software, mass-produced
Custom software, perfo