FreeBSD
Berkeley Software Distribution was created in 1977.
NetBSD is a free, open-source, unix like, multi-platform operating system descended from Berkeley Software Distribution (BSD) and based on 4.4BSD Lite.
A) Free BSD is the operating system BSD(Berkeley's Software Distribution) Linux and Ubuntu are just like kernel.
Berkeley Software Design ended in 2002.
Berkeley Software Design was created in 1991.
Most applications are available at your distribution's repositories, however depending on the kind of distribution, you may have the option to use user-created repositories that allow you to use applications or dependencies that offer features the official packages do not have, or that the official packages are not offered due to legal issues (some distributions have a strict policy against including non-free/proprietary software in their repositories).
The company that developed Berkeley DB software is Sleepycat Software, later Oracle Corporation. Berkeley DB software provides an embedded database for key(value) data.
Scientific Linux is a Linux distribution. It is a free and open source operating system and aims to be as close to the commercial enterprise distribution as possible.
Fedora is a desktop-oriented Linux distribution, and ususally features Red Hat's more experimental software.
Linux is an open source software that has not had a detrimental affect on the marketing of proprietary software. Linux is computer operating system assembled under the model of free and open source software development and distribution.
The three highest rated distribution software packages currently available are Wholesale Distribution Software II from Agnitehc, Pro Edition Wholesale Distribution from NetSuite and Distribution ERP Software Bundler from Epicore.
Software is abbreviated as s/w.