Appendix
Item
Gateway
Hard disk
Host name
HTTP
Install
IP address
JPEG
LAN
Margin
Memory
OS
Pixel
POP
Port number
12
Description
Hardware or software serving as a point connecting networks. Not only connecting, it converts the for- mat, address, protocol, etc. of the data according to the network to be connected.
Mass storage device to save data.
The data is maintained even if the power is turned
OFF.
Name of a device on the network.
Abbreviation of HyperText Transfer Protocol. A pro- tocol used to transmit or receive data between a web server and client (web browser, etc.). Files of image, voice, animation, etc. correlated with the document can be exchanged including the expression form and other information.
To incorporate the hardware, OS, application, printer driver, etc. to a computer system.
A code (address) to identify individual network devic- es on the Internet. Comprises 4 sets of figures of 3 digits at the maximum such as 192.168.1.10. An IP address is allocated to all computers and other de- vices connected to the Internet.
Abbreviation of Joint Photographic Experts Group. |
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One of file formats to save image data (extension: |
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.jpg). |
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Compression rate is approximately 1/10 to 1/100. |
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The compression system is remarkably effective to |
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compress photos or other natural images. | 12 | |
Abbreviation of Local Area Network. A network con- | ||
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necting computers on the same floor, in the same | ||
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building, in the buildings nearby, etc. |
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Blank on the top, bottom, right or left side of prints. |
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Unit to save data temporarily. |
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Data in some memory is erased when the power is |
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turned OFF and not erased in others. | Appendix | |
Abbreviation of Operating System. Basic software to | ||
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control the computer system. Windows, MacOS, |
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and Unix are examples. |
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Abbreviation of Portable Document Format. One of electronic documents (extension: .pdf) in the format based on PostScript which can be accessed using Adobe Reader, software free of charge.
Minimum unit constituting images.
Abbreviation of Post Office Protocol. A protocol to receive electronic mails from a mail server. Currently, POP3, version 3 of POP, is mainly used.
Number to distinguish each communication port of multiple processes working in the computers on the network. A same port cannot be used for multiple processes.
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