Input method editors of Simplified Chinese, Traditional Chinese, and Korean were only included with the 2Z CDs. The difference in the two lay in the extent of multilingual support. Mac OS X 10.0 began a short era (that ended with Mac OS X 10.2 Jaguar's release) where Apple offered two types of installation CDs: 1Z and 2Z CDs. Optical media - DVD playback is not supported, and CDs cannot be burned to.File-sharing server - As a server, the system can share files using only the Apple Filing Protocol (over TCP/IP), HTTP, SSH, and FTP.

It cannot use SMB to connect to Windows or Samba servers.

File-sharing client - The system can only use TCP/IP, not AppleTalk, to connect to servers sharing the Apple Filing Protocol.

Protected memory - memory protection so that if an application corrupts its memory, the memory of other applications will not be corrupted.

Sherlock - desktop and web search engine.

Built on Darwin, a Unix-like operating system.

PDF Support (create PDFs from any application).

Full preemptive multitasking support, a long-awaited feature on the Mac.

TextEdit - new on-board word processor, replacement to SimpleText.

Mac OS had previously had the distinction of being one of the few operating systems with no command line interface at all.

Terminal - the Terminal was a feature that allowed access to Mac OS X's underpinnings, namely the Unix core.

OSFMK 7.3 - the Open Software Foundation Mach kernel from the OSF was part of the XNU kernel for Mac OS X, and was one of the largest changes from a technical standpoint in Mac OS X.

Dock - the Dock was a new way of organizing one's Mac OS X applications on a user interface, and a change from the classic method of Application launching in previous Mac OS systems.

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Mac os 10.10