This report reviews the developments associated with the pressurized, moving-bed gasifier operated at the Morgantown Energy Technology Center during the time period 1964--1977. A short description of coal gasification in general and its specific implications in a moving-bed gasifier are provided. A brief discussion of the history of moving-bed gasifiers, or gas producers as they are more commonly called, is included to set the background and justification for the birth of the METC program. During this program, the METC producer has gasified coals varying in rank from anthracite to lignite at pressures from near atmospheric to 300 psig and at feed rates up to approximately 2,500 lbs per hr. The main accomplishment of the program has been demonstration of the ability to gasify highly caking bituminous coals at pressure and without recourse to expensive pre-sizing or pretreatment. This has primarily been due to the use of a deep-bed stirrer which can break up coal agglomerates and prevent bed plugging or severe gas channeling from occurring. The report describes the problems, both operational and mechanical, that have been encountered during the development and the ways that have been used to solve or circumvent them.