PR <Preview release>

Alias:
preview release
Field:
Software > distribution/circulation > PR

The software which is in the midst of developing, test utilization those which are released to purpose generally. But almost the same meaning as “beta edition”, when the intention that is included it has experiencing especially Advanced Capability in the user, is many. Debugging job because it is not done sufficiently, is lacking in stability, is not suited for the use which is utilized continuously. Usually, that it utilizes that in regard to consent, it is notiified.

PReP

Reading: [puretsupu]
Full spelling: PowerPC Reference Platform
Field:
Personal computer > product > Macintosh > PReP

Common hardware standard of the personal computer which loads PowerPC onto CPU. The IBM corporation and the Motorola corporation announced in 1994 October. There was a feature that AIX and OS/2 of the IBM corporation and Windows NT etc of the Microsoft corporation, plural OS operate, but almost it did not spread. Also the CHRP standard which adds the support of Mac OS of the Apple corporation to PReP was planned, but receiving the policy conversion of the Apple corporation and the PowerPC edition abolition etc of Windows NT, plan collapsed in fact.

PrettyPark <Pretty park>

Reading: Pretty park
Field:
Security > virus/worm > PrettyPark

The computer virus which shakes violence in 1999 June. With E-mail as a mediation, you are infected to the computer where Windows is operational. Disappearing to the system, trick it works, oneself it multiplies via the function and network “of the Trojan horse” the virus which holds the functional both of “Internet worm”. When was attached to the mail the file, “PrettyPark.EXE” is opened, you are infected, you transmit your own duplication to every 30 seconds in the address which is stated in the address register. In addition, while the user does not become aware, using IRC of the kyat system, you connect to the server of specification, the writer of the virus tries can watch and/or can operate that computer that.

PRI <1 digital hierarchy interfaces>

Reading: PR eye
Full spelling: Primary Rate Interface
Alias:
1 digital hierarchy speed interfaces and primary rate interface
Field:
Communication service > public network > ISDN/TA > PRI

The International Telecommunication Union (ITU-TS) standardized, interface standard of the ISDN circuit. As for transmission speed 1.544Mbps.

In Japan, the optical fiber was utilized, it is the service to which “INS net 1500” for big business uses PRI.

In the same way as other interface standard, it stipulates 1 these physical circuits the plural hypothetical circuits (the channel) as gathering. As for PRI, are several choices in manner of division of the channel different from BRI.

As for being most general, “the B channel” of 64kbps consists 23 and “D channel” 1 of 64kbps “23B+D” system. The B channel mainly in sending and receiving of the data and sound, the D channel it is used in order to exchange the data for line control of departure arrival and the like.