Definitely not. Unix was developed around 1969 - 1972, and Operating Systems have been available since the very late 1940's, early 50's.
Unix was first; Linux is a clone of Unix.
The first operating system was developed in the 1950s.
Linus
Linux
Unix came first; Linux is a clone of the Unix Operating System.
The MVS operating system was the most commonly used operating system used on mainframe computers. The MVS operating system was developed by IBM and was first released in 1974.
He developed the CP/M operating system and also had a hand in the development of BIOS
1980
If one or of the operating systems does not cooperate well with dual-booting (such as Windows with a Linux distribution), then you should install the troublesome operating system first. If both are well-behaved (such as two Linux distributions) then it does not generally matter.
Linus Torvalds was the creator of the first linux kernal but other then him thousands of users have helped.
The first OS was technically LEO I (1951) MS DOS (1981) Linux (1991 Even though MS came out first Linux is based on the much much older Unix based system which came out in 1969.
ClarisWorks
The VxWorks is a real time operating system that was developed by Wind River Systems. The operating system was first released in 1987. The operating system is designed for use in embedded systems.