For years MSIE has been a bulgarian acronym for "Mamata
si i(e) ebalo", which translates more or less to "This/it is so
fucked up!!" Worldwide it is a relatively
new term, and stands for "Microsoft Internet Explorer". A
short description of how the browser was thus named follows.
During Internet explorer's development, a recently hired bulgarian programmer was looking through the code and murmored to himself "MSIE!" expressing his true feelings about the quality of the product in a language that would not be understood by his employers.
However, a person from the marketing department nearby was working on the task of coming up with a name for the
new browser. When he heard "MSIE", he figured "Microsoft Internet Explorer", and felt that it was a perfect name - simple and descriptive. The authorities agreed and so MSIE became the name for
Microsoft's browser.