Just wondering: T-bills < 1 years 1 year < T-notes < 10 years Are there any Treasury instruments between 1-2 year maturity? What category do they fall in??

A few aspects: a) If you buy a 30-yr bond, in 28 years you have a two-year treasury instrument b) There are monthly auctions for both two and five year notes both of which are plenty liquid. c) > 10 years = T-bond