Unix
UNIX is a computer operating system, multi-user, multi-task started by a group of employees of AT & T Bell Labs Laboratory by a group of developers known as the Ken Thompson, Dennis Ritchie and Douglas McIlroy
UNIX is a computer operating system, multi-user, multi-task started by a group of employees of AT & T Bell Labs Laboratory by a group of developers known as the Ken Thompson, Dennis Ritchie and Douglas McIlroy