The image shows the front cover of the Mark William Company's Coherent manual. It was a substantial reference book and at least 3" thick. Much of my early UNIX-Linux learning was through this book.
My #Linuxjourney started with the UNIX-clone #Coherent back in the early 1990s when my work was using #SCO UNIX in testing hardware we built. I knew #DOS & #Windows 3.x but needed to learn #UNIX. I bought a copy of Coherent from an ad in #Byte and installed it on my 8086 PC. #linux34years #linux
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