rbowen writes "Apache OpenOffice 3.4.1 has averaged 138,928 downloads per day. That is an average value to the public of $21 million per day, as calculated by savings over buying the competing product. Or $7.61 billion (7.61 thousand million) per year." Link to Original Source
It appears that PL/I (and its dialects) is, or will be, the most widely
used higher level language for systems programming.
-- J. Sammet