Sunday, 4 August 2013

Computer Science General Knowledge - Part II


NANO COMPUTING

  • Nanotechnology is a group of sciences dealing with nanometre-scale devices and particles One nanometre is 0.000000001 of a metre.
  • Nanometre-scale usually indicates measurements up to a few hundred nanometers.
  • Nanocomputing deals with nanometre-scale computers.

BETA TEST

  • A test for a computer product prior to commercial release.
  • Beta testing is the last stage of testing, and normally can involve sending the product to beta test sites outside the company for real-world exposure or offering the product for a free trial download over the Internet.
  •  Beta testing is often preceded by a round of testing called alpha testing.
AJAX


 3G

  • 3G is an ITU specification for the third generation (analog cellular was the first generation, digital PCS the second) of mobile communications technology.
  • 3G promises increased bandwidth, up to 384 Kbps when a device is stationary or moving at pedestrian speed, 128 Kbps in a car, and 2 Mbps in fixed applications.
  • 3G will work over wireless air interfaces such as GSM, TDMA, and CDMA. The new EDGE air interface has been developed specifically to meet the bandwidth needs of 3G.

 CAD/CAM

  • Acronym for computer-aided design/computer-aided manufacturing, computer systems used to design and manufacture products.
  • The term CAD/CAM implies that an engineer can use the system both for designing a product and for controlling manufacturing processes.
  • For example, once a design has been produced with the CAD component, the design itself can control the machines that construct the part.
Data Mining

  • A class of database applications that look for hidden patterns in a group of data that can be used to predict future behavior. For example, data mining software can help retail companies find customers with common interests.
  • The term is commonly misused to describe software that presents data in new ways. True data mining software doesn't just change the presentation, but actually discovers previously unknown relationships among the data.
  • Data mining is popular in the science and mathematical fields but also is utilized increasingly by marketers trying to distill useful consumer data from Web sites.
  • Visit eCRM Guide to learn more about data mining and enterprise applications.
GPRS

  • Short for General Packet Radio Service, a standard for wireless communications which runs at speeds up to 115 kilobits per second, compared with current GSM (Global System for Mobile Communications) systems' 9.6 kilobits.
  • GPRS, which supports a wide range of bandwidths, is an efficient use of limited bandwidth and is particularly suited for sending and receiving small bursts of data, such as e-mail and Web browsing, as well as large volumes of data.
SPYWARE

  • Spyware applications are typically bundled as a hidden component of freeware or shareware programs that can be downloaded from the Internet. Spyware can also gather information about e-mail addresses and even passwords and credit card numbers.
  • Spyware is similar to a Trojan horse in that users unwittingly install the product when they install something else.
  •  A common way to become a victim of spyware is to download certain peer-to-peer file swapping products that are available today.
  • Licensing agreements that accompany software downloads sometimes warn the user that a spyware program will be installed along with the requested software, but the licensing agreements may not always be read completely because the notice of a spyware installation is often couched in obtuse, hard-to-read legal disclaimers.
ERP

  • Short for enterprise resource planning, a business management system that integrates all facets of the business, including planning, manufacturing, sales, and marketing..
  • As the ERP methodology has become more popular, software applications have emerged to help business managers implement ERP in business activities such as inventory control, order tracking, customer service, finance and human resources.
Wi-Fi

  • The Wi-Fi Alliance, the organization that owns the Wi-Fi (registered trademark) term specifically defines Wi-Fi as any "wireless local area network (WLAN) products that are based on the Institute of Electrical and Electronics Engineers' (IEEE) 802.11 standards."
  • Wi-Fi works with no physical wired connection between sender and receiver by using radio frequency (RF) technology.
  • A common misconception is that the term Wi-Fi is short for "wireless fidelity," however this is not the case. Wi-Fi is simply a trademarked term meaning IEEE 802.11x.
IVR

  • Short for interactive voice response, a telephony technology in which someone uses a touch-tone telephone to interact with a database to acquire information from or enter data into the database.
  • IVR technology does not require human interaction over the telephone as the user's interaction with the database is predetermined by what the IVR system will allow the user access to.
  • IVR technology is also used to gather information, as in the case of telephone surveys in which the user is prompted to answer questions by pushing the numbers on a touch-tone telephone.

 Image Map

  • A single graphic image containing more than one hot spot. For example, imagine a graphic of a bowl of fruit. When you click on a banana, the system displays the number of calories in a banana and when you click on an apple, it displays the number of calories in an apple.
  • Image maps are used extensively on the World Wide Web. Each hot spot in a Web image map takes you to a different Web page.
  • Image map is sometimes spelled as one word: imagemap.

 GML

  • Short for Geography Markup Language, an XML-based language for encoding geographic information in order to be stored and transported over the Internet.
  • Developed by the OpenGIS Consortium, GML defines both the geometry and properties of objects that comprise geographic information.
  • GML is a practical application for transferring cartographic information over the Web. Instead of transmitting a GIF or JPG map, GML allows the data to be controlled on the browser end by the user who receives geometries and geographic features and customizes how the data is to be displayed. Geographic data in GML can be sent to any device with an XML interface.
HyperCard


 E-Cycle

  • A term used to describe the practice of recycling computers, computer components and other electronics through reusing or donating them until the end of their lifecycle.
  • E-cycling encourages people to reduce, reuse and recycle rather than dispose of these items prematurely when upgrading to newer products.
  • At the end of the electronics' life, people are then encouraged to dispose of the item at an electronics recycler to keep the electronics out of landfills and reduce the amount of electronic waste. May also be written as eCycle or ecycle.
FIREWALL

  • A system designed to prevent unauthorized access to or from a private network. Firewalls can be implemented in both hardware and software, or a combination of both.
  •  Firewalls are frequently used to prevent unauthorized Internet users from accessing private networks connected to the Internet, especially intranets.
  • All messages entering or leaving the intranet pass through the firewall, which examines each message and blocks those that do not meet the specified security criteria.

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