launchd is a unified, open-source service management framework for starting, stopping and managing daemons, applications, processes, and scripts. Written and designed by Dave Zarzycki at Apple, it was introduced with Mac OS X Tiger and is licensed under the Apache License.

The launchd daemon is essentially a replacement for:

Apple has stated that it intends to eliminate all of the aforementioned services in favor of launchd.

For Mac OS X v10.4 Apple moved most of the processes handled by the previously mentioned daemons to launchd. By consolidating all the launch services into one program, launchd significantly shortens boot time on slow computers.

There are two main programs in the launchd system: launchd and launchctl.

launchd manages the daemons at both a system and user level. Similar to xinetd, launchd can start daemons on demand. Similar to watchdogd, launchd can monitor daemons to make sure that they keep running. launchd also has replaced init as PID 1 on Mac OS X and as a result it is responsible for starting the system at boot time.

Sara Khan (Urdu: سارا خان, Hindi: सारा खान) is an Indian model and actress. She won the Miss Madhya Pradesh title in 2007, the Best New Talent award given by IndianTelevision.com in 2008, and the STAR Parivaar Award for the "Best Patni" (Best Wife) category in 2009.

Sara Khan's first television role was as Sadhna in Sapna Babul Ka...Bidaai. In 2008, she appeared as a star contestant on the show Kya Aap Paanchvi Pass Se Tez Hain?, along with Parul Chauhan who plays her onscreen sister in Sapna Babul Ka...Bidaai. The two of them played the game and then donated the winnings to the charity HelpAge India.

She also appeared in Amul Star Voice of India 2 alongside Angad Hasija, Parul Chauhan, and Kinshuk Mahajan on 20 September 2008 as a celebrity guest. She appeared on the popular TV show 10 Ka Dum, hosted by Salman Khan on 29 August 2009. and has also hosted the Dance Premier League, a dancing reality show that airs on Sony TV. She also appeared on Baat Hamari Pakki Hai on Sony TV as a dancer on 30 and 31 August 2010.