If they are assigned to Combat Arms units they will be commisioned as Regular Army officers. Most ROTC officers are on a reserve commision (even the ones who are active duty). Remeber waht the R in ROTC stands for, it is not the RAOTC.

ETA: One difference is that a Regular Army officer is commisioned until the age of 65, a Reserves Officer's commision ends upon discharge (unless he has IRR comitments).

Quoted: Not even close.  You graduate OCS & College, you will be an Active Duty Officer in the military if you wish.  I'm not sure how one goes abt being a reserve officer, but I went from enlisted to ROTC to Officer. Anyway, these days, Reserve gets as much deployment time as Active Duty.

The part about being a Reserve officer is a commision status rather than a service indicator, there are thousands of Reserve officers serving in Active duty Units. A guy my dad went to flight school with in 75 had served as an enlisted, then went Warrant, they went thier seperate ways, until thier lasts assignment, where they went to the 2/17 Cav at Campbell, my dad was already a RA officer, but his old flight school buddy had to accept at RA commision for one reason or another to be a member of the unit, the buddy had been in for nearly 19 years, all of it active duty, he had no Army Reserve or national Guard time at any point.