Term
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Definition
| Devices that translate data into a form the computer can process. |
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Term
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Definition
| Devices that translate info processed by the computer into a form humans can understand. |
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Term
| How does a keyboard work? |
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Definition
| converts letters, numbers, characters into electrical signals that can be interpreted by the computer. |
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Term
| What are the two types of keyboards? |
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Definition
Wired (connect using a serial or USB port)
Wireless (Infrared or radio frequency) |
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Term
| What are the three terminal types? |
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Definition
1) Dumb- only input and output
2) Intelligent- can perform independent functions. has memory
3)Internet- internet tv, network computer, online game player, smartphones. |
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Term
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Definition
| light-sensitive device that uses a wired connection to a computer terminal. |
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Term
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Definition
| Uses an electronic pen or puck to convert drawings and photos to digital data. |
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Term
| What are scanning and reading devices? |
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Definition
| source-data entry devices that create machine-readable data and feed it directly into the computer |
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Term
| What are three types of mark recognition readers? |
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Definition
1) MICR- magnetic-ink character recognition (bank checks)
2)OMR- optical mark recognition (SAT's)
3)OCR- optical character recognition |
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Term
| What are the two ways to digitize audio? |
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Definition
1)sound board- converts analog sound to digital sound
2)MIDI board- (musical instument digital exchange. |
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Term
| How does a digital camera work? |
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Definition
| uses a light sensitive processor chip to capture photographic images in digital form and store them on a small diskette in the camera or on flash memory cards. |
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Term
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Definition
| input device that collects specific data directly from the environment and transmits it to a computer. |
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Term
| What are Radio frequency ID tags used for? |
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Definition
| has a microchip that contains specific code numbers. Enables items to be tracked without physical contact (cars, drugs, pets) |
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Term
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Definition
| science of measuring individual body characteristics then using them to identify a person through a fingerprint, hand, eye, voice, or facial characteristics. |
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Term
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Definition
| Data shown on a display screen or is in audio or voice form. (not tangible, impermenent.) |
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Term
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Definition
| Relatively permaent- printed and film output. |
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Term
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Definition
| amount of space between adjacent pixels on screen. the closer the pixels, the better the image |
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Term
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Definition
| refers to image sharpness. the more pixels, the better the resolution. |
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Term
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Definition
| the number of bits stored in a pixel. the higher the number, the more true the colors |
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Term
| What is the refresh rate? |
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Definition
| the number of times per second the pixels are recharged. higher rate= less flicker. |
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Term
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Definition
| specialized output device designed to produce large high-quality, 3-D graphics in a variety of colors |
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Term
| What are some hazards of using computers and stuff? |
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Definition
| carpal tunnel syndrome, computer vision syndrome, back and neck pain |
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Term
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Definition
| the methodology of designing a workplace to make working conditions and equipment safer and more efficient. |
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Term
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Definition
| a logically organized collection of related data designed and built for a sepcific purpose. data stored hierarchically |
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Term
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Definition
| the field the uniquely identifies a record. |
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Term
| What is a database management system? |
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Definition
| software written specifically to control the structure of a database and access to the data. |
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Term
| What are some benefits to DBMS? |
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Definition
| reduced data redundancy, speed, improved data integrity, timeliness, ease of sharing, ease of maintenance, forecasting capabilities, increased security |
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Term
| What is a data dictionary? |
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Definition
| repository that stores the data definitions and descriptions of the structure of the data and the database |
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Term
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Definition
| programs that allow you to maintain the database by creating, editing, deleting data, records, and files |
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Term
| What is a report generator? |
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Definition
| Program for producing on-screen or pronted readable documents from all or part of a database. |
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Term
| what is a database administrator? (DBA) |
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Definition
| coordinates all related activites and needs for an organization's database. ensures recoverability, integrity, security, availability, reliability, performance. |
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Term
| What are the 2 types of databases? |
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Definition
| Hierarchical, relational, |
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