The American information-related enterprise such as Apple corporation, IBM corporation and Microsoft corporation being center, the character code system which you lecture, is standardized International Organization for Standardization (ISO) with the portion of ISO/IEC 10646 (UCS-2) as in 1993.
All letters will be expressed 16 bits (2 bytes) with, those which with one character code system many countries word processing tries to be made possible. Most letters of principal language of the world are recorded.
With 2 byte inscription only maximum of 65536 letters because you cannot record, as for Chinese character of the same meaning and the same roots you regard all same letters with Chinese Japanese Korean, when it is something where the integrated work of allotting the same cord/code to be done, ignored the difference of culture, rally is caused.
Unisys LZW patent <LZW patent>
Alias:
GIF patent
Field:
Expression of information > data compression > Unisys LZW patent
Multimedia > graphics > picture type > Unisys LZW patent
|
| The patent regarding the LZW compressed method which the Unisys corporation possessed, is utilized with the GIF picture format and the like. Presently already it has lapsed.
In the patent which it applies the Sperry corporation of that time “High speed data compression and decompression apparatus and method” (high-speed data compression and thawing) (USP4,558,302) as in 1983 June, it was formed in 1985 June. With the system Terry Welch improving the technique, dictionary compression which it announces Abraham Lempel and Jacob Ziv as “LZ77” algorithm, taking the initial 3 in 1977, it is called alias “LZW”. In Japan It is applied in 1984 June as, acquires similar patent even with other worldwide each country. The same company combining with the Burroughs corporation in 1986, became the Unisys corporation, also this patent was taken over to the Unisys corporation.
|
Universal ADSL <G.Lite>
Alias:
G.992.2
Field:
Communication service > broadband > xDSL > Universal ADSL
|
It was standardized, the International Telecommunication Union (ITU-TS) with as “G.992.2” in 1999 June technical specification of simple type ADSL.
But as for ADSL to be already wide using the telephone line which has spread in general home, high speed the technology which does digital communication, with former standard in order to avoid the interference of the aural signal, you must install the equipment which is called [supuritsuta] in member's house, it had become the primary factor which pushes up the production cost of modem.
In G.Lite specification, transmission speed it descended and 1.5Mbps and the rising (member's house -> central telephone exchange) by restricting in 512kbps, without installing [supuritsuta] it reached the point where it can do communication.
|
Universal Binary <Universal binary>
Reading: Universal binary
Field:
OS > Mac OS > Universal Binary
|
| With the inside PowerPC on-board model of the Macintosh personal computer of the Apple corporation and execute form of the software which operates with the Intel CPU on-board model.
Macintosh (Mac) the personal computer of the series has loaded CPU of the PowerPC series ever since 1994, but it was changed to the microprocessor of the Intel corporation where the design differs completely in 2006. As for both because completely there is no compatibility such as instruction set, the software of Universal Binary type records the feasibility image of the type which corresponds to respective CPU both, selecting those whose OS is optimum at the execution time, has reached the point where it executes.
Furthermore, Mac OS of Intel edition X has built in the execution environment which is called “Rosseta”, for existing PowerPC converting the application software to Intel type transparently, it has reached the point where it executes. As for conversion when starting the software is indicated, because it is done automatically, as for the user existing software property can be utilized without being conscious of the conversion of type.
|
UNIX <[yunitsukusu]>
Reading: [yunitsukusu]
Field:
OS > UNIX > UNIX |
OS which in 1968 was developed at the Bell Telephone Laboratories of the American AT&T corporation. It was described with the language where the transferability which does not depend on the hardware, C language is high, in addition the source code relatively from the fact that it is the compact, was transplanted in many platforms.
In addition individual expansion was administered by the hand of the academic institution and the computer manufacturer, many derivations OS are developed, presently is many a thing which calls OS which had the system architecture of the UNIX wind UNIX general term.
Solaris and SunOS of the Sun Microsystems corporation, HP-UX of the Hewlett Packard corporation and AIX of the IBM corporation, the SGI corporation (the old Silicon Graphics corporation) IRIX, the Caldera Systems corporation UnixWare, the University of California [bakuri] school there is derivation OS of BSD and FreeBSD etc and Linux etc Linus Torvalds even just typical ones.
|
|
