Like Chicago Al said, the 112 is the entry level of the Miyata road bikes. Miyata always calls their entry level bike the "One-something" for a long time it was the "One-Ten", then the "One-Twelve" ...its how many gears it has. The "One-Ten" is a Ten speed.
Despite being "entry-level" they're still good cr-mo frames, the components are a little on the cheap side on the 100 level bikes IMO. I took a One-Ten and put shimano 600 shifters and derailleurs, some Mafac brakes and a new crankset on it and its a great commuter now. I rode it to work this morning.