Script vs. Simple Application
I find myself in the habit of saying that I will write a "script" as opposed to an "application" or a "program." I suppose that my habit of saying "script" has roots in procedural language design. Although I still have a habit of saying "script" even if I write an OO application.
Perhaps I unconsciously use the word "script" when I actually mean "simple application" because I want to convey to others that the task will be simple to perform - because I'm leveraging the power of Perl and the CPAN - and will be done quickly.
Perhaps I'm unconsciously thinking that it is risky to say "application" around people who like to over-implement projects (too much planning and hiring of consultants.) On the other hand, it is risky to say "script" around those same people once the development is underway - because they want to be assured that it is being well designed.
Nevertheless, I think that I will try to avoid using the word "script" in most situations.