At this point, if I were to vote for new features....

[webmasterpdx]

OK, I played around with this and it really doesn't do anything.
When in CAS I type m(1)=<4;, it converts the line to m(1):=4;
Also, when you give code examples, please use the correct braces.
e.g. m:={1,2,3}; NOT m:=[1,2,3];
m(1), not m[1].....
None of your links worked....so what exactly is =< other than a replacement for := ?????
Thx
-D