Cisco Systems

Cisco Systems Inc. NASDAQ: CSCO SEHK: 4333 is a global company in the field of telecommunications which is headquartered in San José, California, United States. The company was founded in 1984. It employs 51 480 workers.

Cisco Systems (Cisco) sells networking and communications technology, equipment and services for data transport, voice and video.Produk and service companies consists of several categories such as routers, does even, network access, IP telephony, security, fiber-optic network, data network center, via a network signal to the home network, technical service support and service network.

Cisco Products in korporate addressed to businesses, public institutions, telekomunikasi.Cisco company also provides products used to deliver data, voice, video for inter-building, inter-campus, and all of Cisco's business management dunia.Model more to globalization and termanagement through the five sections countries, namely: Canada, Europe, Asia Pacific, and Japan as well as the existing market.

Source : www.wikipedia.com

Internet Download Manager

Internet Download Manager or a lot of people call him by the name of the IDM, is the software that is able to retrieve / download data exist on the internet. Artificial devices in New York, United States occupies a top position in maximizing data download speeds. Display and simple graphics makes IDM user friendly with.

DM is supported by a resume feature, namely for the sake of re download the files that previously cut off due to lost internet connections, network problems, computer shutdowns, or unexpected power outages.

IDM is able to share a file during download process lasted up to be seven to eight parts.

The latest version 5.18 adds IDM download panel for web-players that can be used to download flash videos from sites like YouTube, MySpaceTV, and Google Video.

When users click on the download link in your browser, IDM will take over the download and accelerate it.

Internet Download Manager can record and download FLV videos from popular sites like YouTube, MySpaceTV, and Google Video. After installing IDM, "Download This Video" button appears each time users watch video anywhere on the Internet.

Antivirus checking makes IDM user who wants to download free of viruses and trojans. IDM automatically run a check once finished downloaded file to protect users from malicious files.

IDM is translated into Albanian, Arabic, Azerbaijani, Bosnian, Bulgarian, Chinese, Croatian, Czech, Danish, Dutch, Persian, French, German, Greek, Hebrew, Hungarian, Italian, Japanese, Korean, Lithuanian, Macedonian, Norwegian, Polish , Portuguese, Romanian, Russian, Serbian, Slovak, Slovenian, Spanish, Thai, Turkish, and Uzbek languages.

Simple installation by the IDM allows users to do the settings and connections status mericek status.

Source : www.wikipedia.com

Digital television

Digital television or DTV is a kind of television that uses digital modulation and compression to broadcast video signal, voice, and data to the television. Digital television is a tool used to capture digital TV broadcasting, the development of analog to digital broadcast system that converts the information into digital signal form of bits of data

Digital TV Frequency
Technically, the tape of the radio frequency spectrum used for analogue television can be used for digital television broadcasting. Comparison of bandwidth used analog technology to digital technology is one: 6. So, when analog technology requires 8 MHz bandwidth for a single transmission channel, digital technology with the same bandwidth (using the technique of multiplex) can emit as much as six to eight channels transmitting simultaneously to different programs.

Digital TV transmitter systems
There are three standard digital television transmitter systems in the world, the digital television (DTV) in the United States, terrestrial digital video broadcasting (DVB-T) in Europe, and integrated service digital broadcasting terrestrial (ISDB-T) in Japan. All standards-based digital system transmitter system coding OFDM system with MPEG-2 sound code for the ISDB-T and DTV as well as MPEG-1 for DVB-T.

The advantages of digital TV frequencies
Broadcast using a digital system to have robustness against disturbances and easy way to repair digital codes via error correcting codes. The result is picture quality and sound are far more accurate and higher resolution than analog television broadcasts. In addition to digital television broadcasts using low power.

Source : www.wikipedia.com

Operating Systems

The operating system is a software system that served to make the control and management of hardware and basic system operations, including the software applications such as word processing programs and web browsers.

In general, the Operating System software is the first layer is placed on the computer memory when the computer starts.

Operating systems generally consist of several parts:

1. Boot mechanism, namely to put the kernel in memory
2. Kernel, the core of an Operating System
3. Command Interpreter or shell, which reads input from the user
4. Libraries, which provides the basic set of functions and standards that can be called by other applications
5th. Drivers to interact with external hardware, as well as to control them.

Operating System currently

Operating system-the main operating system used by the general system of computers (including PCs, personal computer) are divided into three major groups:

1. Family Microsoft Windows - which is comprised of the Windows Desktop Environment (version 1.x to version 3.x), Windows 9x (Windows 95, 98, and Windows ME), and Windows NT (Windows NT 3.x, Windows NT 4.0 , Windows 2000, Windows XP, Windows Server 2003, Windows Vista, Windows 7 (Seven), was released in 2009, and Windows Orient which will be released in 2014)).
2. Unix family of operating systems that use the POSIX interfaces, such as SCO UNIX, family BSD (Berkeley Software Distribution), GNU / Linux, MacOS / X (BSD-based kernel is modified, and known by the name of Darwin) and GNU / Hurd.
3. Mac OS, is the operating system for Apple computers commonly referred to output your Mac or Macintosh. Newest operating system is Mac OS X version 10.4 (Tiger). Early in 2007 planned launch of version 10.5 (Leopard).

Source : www.wikipedia.com

Multimedia

Multimedia is the use of computers to present and combine text, sound, graphics, animation and video with tools ([tool]) and connectivity ([link]) so that users can be had ([navigation]), interact, work and communicate.

At first multimedia includes only media to be consumed senses of sight (still images, text, video motion picture, and the invention of motion picture / animation), and consumption of auditory (sound). In the development of multimedia includes also the kinetic (motion) and the smell of which is the sense of smell.

The smell started to become part of a multimedia since found the smell of reproductive technologies by telecommunications. With the smell of the input device, an operator can transmit the results of digitizing the smell via the internet. Recipients should be available on a computer output device reproduction machine odor.

Source : www.wikipedia.com

Graphic tablet

Graphics tablet is a hardware or computer input device that allows the wearer to draw by hand and insert a picture or sketch directly into the computer, like drawing on paper using pencil.

Operation

Passive Tablets
Passive tablet, which was introduced by Wacom, using electromagnetic induction technology, where the horizontal and vertical wires of the tablet operating as a sender and receiver rolls (coils). Tablet generate electromagnetic signals, received by the LC circuit in the pen. Cable in the tablet then change the mode of receiving and reading the signals raised by the pen.

Active Tablet
The difference lies in the passive tablet stylus. Active stylus on the tablet strength depends on the internal battery, not on tablets. This pen to create his own energy (self-powered) to then generate a signal on the tablet. By removing the obligation to supply energy to the pen, it means that the tablet will be able to obtain a constant signal to the pen, because he did not have to replace the signal and receiver modes, thus sending a signal will be more efficient.

Source : www.wikipedia.com

Global village

Global Village is a concept of the development of communications technology in which the analogue world into a village which is very large.

McLuhan said that the global village occurred as a result of the dissemination of information very quickly and massive in the community. Rapid and massive spread of this use of information and communication technology.

The impact of the global village
According to McLuhan, global village during the case, information and communication will be very open, so does the role of mass media in transforming the message. The impact on the community is that people will tend to have the same perception for obtaining equal opportunity to access information.

Source : www.wikipedia.com

Computer Networks

Computer network was a system that consists of computers and other network devices that work together to achieve a common purpose.

The purpose of the computer network are:

Dividing resources: for example the use of shared printers, CPUs, memory, hard drive.
Communication: eg electronic mail, instant messaging, chat
Access to information: for example web browsing.

In order to achieve the same goal, every part of the request and provide computer network services (service). Parties who request a service called the client (client) and that provides service is called servant (the server). This architecture is called client-server system, and used on almost all computer network applications.

Source : www.wikipedia.com