The room temperature rotational spectrum of methyl carbamate, CH₃OCONH₂, has been recorded between 79 and 371 GHz with the Fast Scan Submillimeter-wave Spectroscopic Technique (FASSST) spectrometer. Methyl carbamate is a molecule of astronomical interest because it is a structural isomer of the amino acid glycine. It has a methyl group internal rotor that causes each rotational transition to split into an A and an E component. 6000 new transitions from the vibrational ground state have been assigned, about half of them belonging to E components. Spectroscopic assignments have been made easier by the integration of the programs CAAARS and ERHAM. CAAARS is a program suite for visual interactive assignment of asymmetric rotor spectra using Loomis-Wood diagrams. ERHAM solves the effective rotational Hamiltonian for molecules with two periodic large-amplitude internal motions that can be applied also to molecules with only one internal motion. The Hamiltonian has been used to fit 28 spectroscopic parameters for the methyl carbamate ground state to the observed transition frequencies. The constants determined reproduce the observed line positions with a standard deviation of 0.082 MHz. They were used to predict the rotational spectrum of methyl carbamate to be used by radio astronomy.