new computer definations

• E-commerce hosting:E-commerce hosting is a business in which a company provides other companies whatever they need to sell their products and services on the World Wide Web.
• EDFA: An erbium amplifier, also called optical amplifier or an erbium-doped fiber amplifier or simply EDFA, is an optical or IR repeater that amplifies a modulated laser beam directly, without opto-electronic and electro-optical conversion.
• Ubuntu: Ubuntu is an open source Debian-based Linux distribution. Sponsored by Canonical Ltd, Ubuntu is considered a good distribution for beginners. The operating system was intended primarily for personal computers (PCs) but it can also be used on servers.
• Ubiquitious computing: Ubiquitious computing is the trend towards increasingly ubiquitous, connected computing devices in the environment, a trend being brought about by a convergence of advanced electronic and particularly wireless technologies and the Internet.
• Ultra HDTV: Ultra HDTV, also referred to as full-HDTV, true HDTV and 1080p, is a television display technology that surpasses the video quality and sharpness of the original high-definition television ( HDTV ) technology, providing an image resolution of 1920 by 1080 pixels.
• XDMA: XDMA (Xing Distributed Media Architecture) is a network architecture for multicast streaming media transmissions. Streaming media enables live viewing of a transmission as compared to processes that require that files be completely transferred to the user's computer before their data can be viewed.
• Typo squatting: Typo squatting, also called URL hijacking, is a form of cyber squatting based on the probability that a certain number of Internet users will mistype the name of a Web site (or actually its URL) when surfing the Web.
• Cyber squatting: The practice of purchasing a domain name that contains a well-known trademark or commercial name. The cyber squatter then offers to sell the domain to the person or company who owns a trademark contained within the name at an inflated price.
• Aircard: Aircard is a device that plugs into a laptop computer, typically through a USB connection or PC Card slot that uses a cell phone signal to provide high-speed Internet access.
• Google Dance: Google dance refers to the Google search engine and their process of re-arranging the rankings of Web sites, and how they are placed in the serps. This happens every 6 - 10 weeks, when Google re-indexes their databases of web-sites.
• Cyberagents: Cyberagents refers to the growing trend of shifting many jobs so that the employee works out of his or her home instead of the office.
• Social bookmarking: Social bookmarking allows consumers to share their favorite bookmarks, Web sites, or content with others by submitting links to a public or semi-public forum.
• Digital footprint: Digital footprint specifically describes the trail which a person leaves behind in cyberspace or on any form of digital communication.
• Hacktivism: A hacktivist is one who combines hacking skills with activism in order to attack (shut down or deface) certain Web sites as a form of political protest.
• CDMA One: CDMA One, also written cdmaOne, refers to the original ITU IS-95 (CDMA) wireless interface protocol that was first standardized in 1993. It is considered a second-generation (2G) mobile wireless technology.
• WCDMA: W-CDMA is a third-generation (3G) mobile wireless technology that promises much higher data speeds to mobile and portable wireless devices than commonly offered in today's market.
• CDMA2000: CDMA2000, also known as IMT-CDMA Multi-Carrier or 1xRTT, is a CDMA version of the IMT-2000 standard developed by the International Telecommunication Union (ITU).
• B GAN: BGAN (Broadband Global Area Network) is a mobile communications system created to transmit broadband wireless voice and data communications almost anywhere on the earth's surface except the regions immediately surrounding the north and south geographic poles.
• DVB-H: Digital Video Broadcast - Handheld (DVB-H) is the technology driving mobile TV. A combination of conventional digital video and IP, DVB-H scales for smaller devices a technology that's already in place in millions of TV sets worldwide.
• BREW :BREW (Binary Runtime Environment for Wireless) is Qualcomm's open source application development platform for wireless devices equipped for code division multiple access (CDMA) technology.
• Cellular Telephone: A Wi-Fi cell phone is a cellular telephone that can automatically switch between conventional cellular and Wi-Fi VoIP modes, even during the course of a conversation. A Wi-Fi LAN acts, in effect, as a cellular repeater for such a phone.
• 4G: 4G is the short term for fourth-generation wireless, the stage of broadband mobile communications that will supersede the third generation (3G). End-to-end IP and high-quality streaming video will be among 4G's distinguishing features.
• UMTS:Universal Mobile Telecommunications Service(UMTS) is a third-generation (3G) broadband, packet-based transmission of text, digitized voice, video, and multimedia at data rates up to 2 megabits per second (Mbps).
• HSPDA: High Speed Downlink Packet Access (HSDPA) is a new protocol for mobile telephone data transmission. It is known as a 3.5G (G stands for generation) technology.
• Optical Character Recognition: OCR, optical character recognition refers to the branch of computer science that involves reading text from paper and translating the images into a form that the computer can manipulate. All OCR systems include an optical scanner for reading text and sophisticated software for analyzing images.
• Multi-Function Devices: Devices that combine the functionality of a printer and scanner are called Multi-Function devices. Some multifunction devices can also add additional facilities like that of a dial up modem that can used to fax images scanned with scanner
• Resolution: In computers, resolution is the number of pixels (individual points of color) contained on a display monitor, expressed in terms of the number of pixels on the horizontal axis and the number on the vertical axis.
• Compression: Compression is the reduction in size of data in order to save space or transmission time. For data transmission, compression can be performed on just the data content or on the entire transmission unit (including header data) depending on a number of factors.
• Optical Devices: An optical mouse is an advanced computer pointing device that uses a light-emitting diode (LED), an optical sensor, and digital signal processing (DSP) in place of the traditional mouse ball and electromechanical transducer.
• Flatbed Scanner: A flatbed scanner is usually composed of a glass pane (or platen), under which there is a bright light (often xenon or cold cathode fluorescent) which illuminates the pane, and a moving optical array, whether CCD or CIS.
• ATA / IDE: ATA is a standard interface for connecting storage devices such as hard disks, solid state disks and CD-ROM drives inside personal computers.Many synonyms for ATA exist, including abbreviations such as IDE and ATAPI.
• Mega Pixel:A megapixel refers to one million pixels and is commonly used in reference to digital cameras as an indication of resolution capability. Greater numbers of dots or pixels allow for more refinement of the image, which results in higher, truer image replication.
• Buffer: A Buffer is a temporary storage area, usually in RAM. The key purpose of most buffers is to act as a holding area, so that the CPU can manipulate data before transferring it to a device.
• SATA:Serial Advanced Technology Attachment (SATA) is a computer bus primarily designed for transfer of data between a computer and mass storage devices such as hard disk drives and optical drives.SATA is based on serial signaling technology, unlike current IDE hard drives that use parallel signaling.
• Buffer Underrun Protection: Buffer Underrun Protection is a common problem that occurs when burning data into a CD. It happens when the computer is not supplying data quickly enough to the CD writer for it to record the data properly.
• NAND / NOR FLASH:Flash Memory products are based on two technologies namely NAND and NOR Flash. NAND is used in memory cards such as the Compact Flash cards.NOR is found in lower end set-top boxes, mobile handsets, and BIOS chips.
• Page per Minute (PPM):PPM or Page per Minute is a common method of measuring the output of a printer, as it determines the speed a printer is capable of printing. PPM between different printers cannot be compared on a one-to-one ratio, as you can expect a different PPM number between different types of printers
• Switched-mode power supply(SMPS): A switched-mode power supply or SMPS, is an electronic power supply unit (PSU) that incorporates a switching regulator. This rapidly switches a power transistor between saturation (full on) and cutoff (completely off).
• PictBridge: PictBridge is a standardized technology that allows printing images from a memory card in a digital camera directly to a printer, regardless of brand.The technology completely bypasses the need for a computer.
• Analog-to-digital converter(ADC): An analog-to-digital converter is an electronic integrated circuit, which converts continuous analogue signals to discrete digital numbers or form.The digital output may be using different coding schemes, such as binary, Gray code or two's complement binary.
• Charge-coupled device (CCD):CCD is a light-sensitive integrated circuit that stores and displays the data for an image in such a way that each pixel in the image is converted into an electrical charge the intensity of which is related to a color in the color spectrum.
• Photo Printers: A photo printer is usually an inkjet printer that is specifically designed to print high quality digital photos on photo paper. These printers usually have a very high number of nozzles and are capable of printing droplets as small as 1 picoliter.
• HD-DVD / AOD: High-Definition DVD is a new format of optical storage that primarily intended to store High Definition video data. It was also referred to as Advanced Optical Disk.
• Memory Stick: A Memory Stick is an IC (Integrated Circuit) which is stored in a compact and rugged plastic enclosure. Memory Sticks are designed to store data and to enable the transfer of data between devices equipped with Memory Stick slots
• Bad Sector: Hard drives contain millions of sectors. It is very normal for some of these sectors to be bad sectors, even when the drive is first manufactured. In addition, a small number of sectors will normally go bad during the lifespan of a drive
• BIOS/CMOS: BIOS(Basic Input Output System) refers to asset of instructions that are critical for the functioning of the system.CMOS (Complementary Metal Oxide Semiconductor) refers to the chip on which the BIOS instructions are stored.
• Composite Video: Composite video is the most common type of video interface for sending or receiving an analog video signal to or from a television set. In a layman’s language, a type of video signal in which all information—the red, blue, and green signals (and sometimes audio signals as well)—are mixed together.
• Response time: In LCD’s, since the source of light is always on, the concept of refreshing is not applicable. Response time refers to the time it takes the liquid crystal to change shape. Since changing that shape also changes the light passing to the screen, response time is defined in two alternative ways. Black-to-black response time and Grey-to-grey response time
• Ghosting: This phenomenon is seen in LCD’s with a low response time. When dealing with any scene that involves fast motion, pixels that are not quickly updated retains their previous state for a brief moment even as the adjoining pixels have been updated, causing the eye to detect a double image, or “ghost”.
• Hybrid Drives: These are hard drives that include both rotating disks as well as Flash memory based storage. This is an attempt to combine the benefits of the two types of storage media: the inexpensiveness of rotating platters and the non-volatility of Flash memory. The data in a Hybrid Drive is finally written onto the disk as the Flash memory component is a temporary storage area.
• Charge-coupled device (CCD) :CCD is a light-sensitive integrated circuit that stores and displays the data for an image in such a way that each pixel in the image is converted into an electrical charge the intensity of which is related to a color in the color spectrum.
• Photo Printers: A photo printer is usually an inkjet printer that is specifically designed to print high quality digital photos on photo paper. These printers usually have a very high number of nozzles and are capable of printing droplets as small as 1 picoliter.
• HD-DVD / AOD: High-Definition DVD is a new format of optical storage that primarily intended to store High Definition video data. It was also referred to as Advanced Optical Disk.
• Memory Stick: A Memory Stick is an IC (Integrated Circuit) which is stored in a compact and rugged plastic enclosure. Memory Sticks are designed to store data and to enable the transfer of data between devices equipped with Memory Stick slots
• Bad Sector: Hard drives contain millions of sectors. It is very normal for some of these sectors to be bad sectors, even when the drive is first manufactured. In addition, a small number of sectors will normally go bad during the lifespan of a drive
• BIOS/CMOS: BIOS(Basic Input Output System) refers to asset of instructions that are critical for the functioning of the system.CMOS (Complementary Metal Oxide Semiconductor) refers to the chip on which the BIOS instructions are stored.
• Composite Video: Composite video is the most common type of video interface for sending or receiving an analog video signal to or from a television set. In a layman’s language, a type of video signal in which all information—the red, blue, and green signals (and sometimes audio signals as well)—are mixed together.
• Response time: In LCD’s, since the source of light is always on, the concept of refreshing is not applicable. Response time refers to the time it takes the liquid crystal to change shape. Since changing that shape also changes the light passing to the screen, response time is defined in two alternative ways. Black-to-black response time and Grey-to-grey response time
• Ghosting: This phenomenon is seen in LCD’s with a low response time. When dealing with any scene that involves fast motion, pixels that are not quickly updated retains their previous state for a brief moment even as the adjoining pixels have been updated, causing the eye to detect a double image, or “ghost”.
• Hybrid Drives: These are hard drives that include both rotating disks as well as Flash memory based storage. This is an attempt to combine the benefits of the two types of storage media: the inexpensiveness of rotating platters and the non-volatility of Flash memory. The data in a Hybrid Drive is finally written onto the disk as the Flash memory component is a temporary storage area.
• GoogleWhack: The goal of a GoogleWhack is to perform search queries that will produce only one single search result in the Google search engine.
• Solid State drive: A solid state drive (SSD) is a data storage device that uses solid state memory to store persistent data. With no moving parts, a solid state drive is usually more robust, effectively eliminating the risk of mechanical failure, usually silent, and usually enjoys reduced seek time and latency by removing mechanical delays associated with hard disk drives.
• Blu-ray Disc: Blu-ray Disc is a next generation optical disc storage media format developed by Sony and others.
• Spoofing: In the IT world, spoofing refers tricking or deceiving computer systems or other computer users.
• Microsoft Surface: Microsoft Surface is a forthcoming multi-touch product from Microsoft which is developed as software and hardware combination technology
• MobileTV?: Mobile TV means bringing the content that is available on TV to mobile phones via mobile telecommunications networks.
  

diffrance between lan and wan

LAN	WAN
LAN stands for local area network.	WAN stands for wide area network.
LAN (Local Area Network) is a computer network covering a small geographic area, like a home, office, or group of buildings	WAN (Wide Area Network) is a computer network that covers a broad area (i.e., any network whose communications links cross metropolitan, regional, or national boundaries
EX: Network in an organization can be a LAN	Internet is the best example of a WAN
Typically owned, controlled, and managed by a single person or an organization	WANs (like the Internet) are not owned by any one organization but rather exist under collective or distributed ownership and management
LANs have a high data transfer rate	WANs have a lower data transfer rate as compared to LANs
A LAN is cheaper than WAN.	WAN is more expensive than LAN.
LAN is note connection oriented.	WAN is connection oriented.
LAN uses the Ethernet standard.	WAN uses the T1 standard.