Update README.md

README.md

@@ -58,3 +58,13 @@ Static executable snapshots are also provided for GNU/Linux systems.
 (usage)
 
 TODO
+
+# επιπλέον
+(extra)
+
+Pi version numbers are the digits of Pi followed by a letter indicating the phase of development the program is in.
+For example, the version string:
+`3.14a`
+Is the third version produced in the alpha phase.
+The digits of Pi will reset back to `3` when moving to a new phase.
+If the number gets too long, it will be digits of 2π, 3π etc.