A propretary *(programming language) descendent of _(APL).

From _("Jsoftware home page" | http://www.jsoftware.com/):
<BLOCKQUOTE>
J is a modern, array oriented, high level, high performance, general purpose _(programming language). J is used in a variety of industries including banking, investment analysis, insurance, derivative trading, scientific research, and education.
</BLOCKQUOTE>
