Interactive Systems Corporation
（重定向自Interactive Unix）
![PC/IX for the IBM PC running in a virtual machine](/Images/godic/202501/20/PC-IX_for_the_IBM_PC3259.png")
![INTERACTIVE UNIX with Looking Glass interface under QEMU](/Images/godic/202501/20/Interactive-unix-w-looking-glass3259.png")
![Interactive Unix 5¼-inch floppy disks](/Images/godic/202501/20/Iusdisk3259.jpg")
Interactive Systems Corporation (styled INTERACTIVE Systems Corporation, abbreviated ISC) was a US-based software company and the first vendor of the Unix operating system outside AT&T, operating from Santa Monica, California. It was founded in 1977 by Peter G. Weiner, a RAND Corporation researcher who had previously founded the Yale University computer science department and had been the Ph. D. advisor to Brian Kernighan, one of Unix's developers at AT&T. Weiner was joined by Heinz Lycklama, also a veteran of AT&T and previously the author of a Version 6 Unix port to the LSI-11 computer.