Are there established alternatives to ISomething / ISomethingable for interfaces?

Question

The .NET standard of prefixing an interface name with an I seems to be becoming widespread and isn\'t just limited to .NET any more. I have come across a lot of Java code that u

Answer 1

The coding standard for Symbian has interfaces (pure abstract C++ classes) denoted with an M rather than an I.

Otherwise, the only other way I have seen of denoting interfaces is through context.