This volume reports experimental and theoretical results of a study of entrained coal gasification with steam and oxygen. Interim results were reported in a previous report. The gasifier facility and testing methods were revised and substantially improved. The gasifier was also modified for high pressure operation. Fifty-four gasification tests were completed since the interim report to complete optimization tests and mapping tests for four coal types at atmospheric pressure. Effects of coal type, reactant feedrates and proportions, and coal size on carbon conversion and gas composition were identified and partially correlated. Seventeen tests were conducted at elevated pressures to 140 psig with the Utah bituminous coal for premixed and diffusion flames. Effects of pressure, reactant feedrates and proportions and flame type on carbon conversion and gas composition are reported. The LDV system was used on the cold-flow facility to make additional nonreactive jet mixing measurements (local mean and turbulent velocity) to validate the two-dimensional code. The previously completed two-dimensional entrained coal gasification code, PCGC-2, was evaluated through rigorous comparison with cold-flow, pulverized coal combustion, and entrained coal gasification data from this laboratory and other laboratories. A complete set of the data used has been compiled into a Data Book which is included as Volume 3 of this final report. A revised user's manual for the two-dimensional code has been prepared and is also included as Volume 2 of this final report. Ease of PCGC-2 operation and numerical efficiency for gasification was improved and the first comprehensive application of the code to entrained gasification was conducted, with twenty-two converged gasification solutions being obtained. 153 references, 101 figures, 17 tabs.