sgit -e 's/Un\*x/Unix/g' -e 's/UN\*X/UNIX/g' .

This is not only to help with formatting - especially important in
markdown files -  but it's no longer really necessary to do it. One
might not feel the need to do it in non-markdown files but I did it
anyway to be consistent. Thus instead of showing Un*x/UN*X it shows
Unix/UNIX.

A question of whether or not it should all be the same case is another
thing entirely but if this is desired at some point it should be easy to
do anyway - with some care in case it's in formatted text.

A note about the glob: why '.' when there are C files and other file
types where it could be dangerous to modify? Because I did a git grep
first so I knew that it was safe.

1987/biggar/README.md

@@ -32,7 +32,7 @@ want. This is a very efficient way to transfer source, though it
 increases the size of Makefiles.
 
 With only slight variations, this program can be set to many uses.
-Consider how easy it would be to release `Un*x` source in this form;
+Consider how easy it would be to release `Unix` source in this form;
 so what if the Makefiles grow a little!  :-) 
 
 One vendor's lint got hung in an infinite loop over this entry!

1987/korn/README.md

@@ -16,7 +16,7 @@ make all
 ## Judges' remarks:
 
 The Judges believe that this is the best one line entry ever received.
-Compile on a `UN*X` system, or at least using a C implementation that
+Compile on a `UNIX` system, or at least using a C implementation that
 fakes it.  Very few people are able to determine what this program
 does by visual inspection.  I suggest that you stop reading this
 section right now and see if you are one of the few people who can.

1987/rules.txt

@@ -57,7 +57,7 @@ X	<assume a standard 8 character tab stop>
 
 	    * If you give a 'postal address', please include your Country.
 
-	    * Give the machine and operating system (i.e., Un*x version) on
+	    * Give the machine and operating system (i.e., Unix version) on
 	      which your program ran.
 
 	    * The 'remarks' item is not optional.  Please indicate:
@@ -149,7 +149,7 @@ JUDGING:
 
 	Points will be taken away for programs that:
 
-		* are very hardware or Un*x version specific
+		* are very hardware or Unix version specific
 		* dump core or have compiler warnings
 		  (we won't take points away if you warn us in the remark item)
 		* fail to compile