My music tends to use a lot of ostinatos (or ostinati, if you prefer).

What's an ostinato?
The simplest description is that an ostinato is a repeated pattern or figure, frequently heard in a bass or percussion instrument. They're used a lot in pop music. (I like to think of their use today as a revival, because they first were very popular from the sixteenth to early eighteenth centuries, especially in instrumental music, much of which was based on dance music.)

Back to the original question...
Osti Music is the name of my ASCAP-registered publishing company. I arrived at that name because several years ago, when I was a junior in college, I had a chance to meet one of my heroes (and then future teacher), John Corigliano. Since I wanted desperately to study with John at Juilliard following graduation, I eagerly left a stack of scores for him at his hotel. (He'd actually invited me to do this; I wasn't simply stalking.)
A week or so later, John called me to talk about my music. He had some nice things to say, but his biggest criticism was that my music used too many ostinatos. "Ostinato crazy," he called me. (Interestingly enough, Corigliano has a work called Fantasia on an Ostinato.)
A few weeks after that conversation, I became a publisher member of ASCAP. After struggling to think of a name that wasn't taken, I shortened Corigliano's criticism from "Ostinato" to "Osti," and that's been my publishing company's name ever since.

Just to beat a dead horse... The formal definition of ostinato can be found here. Want a whole lesson about ostinatos? Click here. If you know Finnish, you may like this site : www.ostinato.fi. (Additionally, if you know Finnish and can tell me what that page says, please do.)