In this final report, we summarize some of our results from September 1989 to October 1990. The design, construction, and testing of a four-processor prototype multi-processor (RTP) board using TI TMS320C25 DSP chips has been completed. We are now finishing the extensive detailed final documentation of the RTP hardware and software. This extensive documentation will be provided to Steve Azevedo when we return the borrowed workstation and deliver the RTP to LLNL. A summary of the test results are in Section II. The design of our fully custom CMOS VLSI chip has been completed. The chip has been designed, the layout completed, and the chip is now going through its final pre-fabrication simulations. The present status of the custom chip design activity will be summarized in the separately submitted Final Report on the Real-Time Multi-Dimensional Processing Hardware Designs'' Project.'' Evaluations of the hardware requirements for fast filtering of data for filtered backprojection have been completed and are summarized. We briefly summarize the test results of the TMS320 multi-processor prototype RTP board evaluation.