这是 Unix V4 吗？
我仔细查看了Unix V4的磁带，发现它与Unix V5非常相似。日期是1974年6月，包含了各种工具，比如在Unix V5手册中有但在V4手册中没有的diff。我怀疑这盘磁带是在Unix V5发布之前不久制作的，按照维基百科的资料，Unix V5也是在1974年6月发布的，而Unix V4则是1973年11月的。我不太相信我们在12月之前真的有更多的信息。
<p>古斯·费尔南德斯
查看原文
I've been looking closely at the Unix V4 tape and it looks awfully similar to Unix V5. The dates are from June 1974 and it includes various tools such as diff which are in the Unix V5 manual but not in the V4 manual. I suspect that this tape was made shortly before the Unix V5 release which according to https://en.wikipedia.org/wiki/Research_Unix was also released in June 1974 whereas Unix V4 was from November 1973. I'm not convinced that we really have much more than we did before December.<p>Gus Fernandez