MAC 音标拼音: [m'æk]
媒体接入控制,媒体访问控制,介质访问控制
媒体接入控制,媒体访问控制,介质访问控制
mac n 1 :
a waterproof raincoat made of rubberized fabric [
synonym :
{
macintosh }, {
mackintosh }, {
mac }, {
mack }]
mac \
mac \
n .
Shortened form of {
mackintosh },
a waterproof raincoat made of rubberized fabric .
Syn :
mackintosh ,
mac ,
mack .
[
WordNet 1 .
5 ]
Mac \
Mac \
prop .
n .
Shortened form of {
Macintosh },
a brand name for a personal computer ;
as ,
the latest Mac has great new features .
[
PJC ]
Mac \
Mac \ [
Gael .,
son .]
A prefix ,
in names of Scotch origin ,
signifying son .
[
1913 Webster ]
The line of computers manufactured by {Apple Inc }.
Mac " is not primarily a nickname or an abbreviation , but a
brand name and trademark in its own right . Apple currently
2009 ) refer to the brand as any of "Mac ", "iMac " or
Macintosh " (all registered trademarks ).
The Mac was Apple 's successor to the {Lisa }. The project was
proposed by {Jef Raskin } some time before {Steve Jobs }'s
famous visit to {Xerox PARC }. Jobs tried to scuttle the
Macintosh project and only joined it later because he wasn 't
trusted to manage the {Lisa } project .
The {Macintosh user interface } was notable for popularising
the {graphical user interface }, with its easy to learn and
easy to use {desktop } metaphor .
The first Macintosh , introduced in January 1984 , had a
Motorola 68000 } {CPU }, 128K of {RAM }, a small {monochrome }
screen , and one built -in {floppy disk } drive with an external
slot for one more , two {serial ports } and a four -voice sound
generator . This was all housed in one small plastic case ,
including the screen . When more memory was available later in
the year , a 512K Macintosh was nicknamed the "Fat Mac ."
The Mac Plus (January 1986 ) added expandability by providing
an external {SCSI } port for connecting {hard disks }, {magnetic
tape }, and other high -speed devices .
The Mac SE (March 1987 ) had up to four megabytes of {RAM }, an
optional built -in 20 megabyte hard disk and one internal
expansion slot for connecting a third -party device .
The Mac II (March 1987 ) used the faster {Motorola 68020 } {CPU }
with a 32 -bit {bus }.
In 1994 the {Power Mac } was launched , and in 1999 the {iMac }
was introduced . The {SuperDrive } appeared in the iMac in 2002 .
The {Macintosh Operating System } is now officially called "Mac
OS ". Mac OS X is the successor to Mac OS 9 , although its
technological parent is the {NEXTSTEP } OS from {Next , Inc .},
founded by Steve Jobs after he left Apple the first time . OS
X is based largely on the {BSD } UNIX system . The core of the
OS X operating system is released as free {source code } under
the project name {Darwin }.
The standard Macintosh screen {resolution } is 72 {dpi } (making
one {point } = one {pixel }), exactly half the 144 dpi
resolution of the ancient {Apple Imagewriter } {dot matrix }
printer .
If "Macintosh " were an acronym , some say it would stand for
Many Applications Crash , If Not , The Operating System Hangs ".
While this was true for pre Mac OS 9 systems , it is less true
for Mac OS 9 , and totally incorrect for Mac OS X , which has
protected memory , so even if one application crashes , the
system and other applications are unaffected .
See also {Macintosh file system }, {Macintosh user interface }.
Apple Home (http ://apple .com /mac )}.
2009 -05 -05 )
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