Wojciech Puchar wrote:

> but most useful is to explain sender (politely) that he should send
> interchangable data, and explain it is easily possible even with his
> software (windoze)

useful to whom? Too many of the people one has to work with are 
lost once double-clicking fails to open a document. Associate a 
doc with an app? many don't know what that means (even MacOS is 
helpful enough to suggest some options). Use File->Open? too much 
like work. I don't mean to sound sarcastic but no one wants to 
hear a lecture on MSFT's perfidy or the elegance of open source 
when they want numbers for a report for their boss.

Windows apps, like it or not, offer lots of functionality that is 
lost in a pure ASCII world, and the open source alternatives have 
yet to catch up. Unlikely they ever will . . . . .