Key Note Address.- Programmable Interface Design in HFDS.- 1: ITRON.- Considerations of the Performance of a Real-Time OS.- Dynamic Stepwise Task Scheduling Algorithm for a Tightly-Coupled Multiprocessor ITRON.- A Graphical Debugger for HI8.- HI8-3X: A AITRON-Specification Realtime Operating System for H8/300 Series Microcontrollers.- 2: BTRON.- Design Policy of the Operating System Based on the BTRON2 Specification.- A Study on a Hypermedia Editor on BTRON1 Specification Operating System.- 3: CTRON.- CTRON Software Portability Evaluation.- Portability Consideration of i386 (TM)-Based Basic OS (OS/CT).- OS Subset Structure Achieving AP Portability.- An Evaluation Method of Kernel Products Based on CTRON.- Development of CTRON Operating System for Communication Processing.- 4: CHIP (1).- Implementation and Evaluation of Oki 32-bit Microprocessor 032.- Design Considerations of On-Chip-Type Floating-Point Units.- The Design Method of High Speed Cache Controller/Memory (CCM) for the GMICRO Family Microprocessors.- The Evaluation of M32/100's Bitmap Instructions Used in the Graphic Primitive.- 5: CHIP (2).- Inline Procedures Boost Performance on TRON Architecture.- A Forth Kernel for Gmicro.- The GMICRO Microprocessor and the AT&T UNIX Operating System.- SRM32: Implementation of Symbolic ROM Monitor on GMICRO F32 Series.- Performance Evaluation of TOXBUS.- Appendix: Additional Contributions.- Realtime OS TR90 Based on Micro-ITRON Specification.- Communication Terminal for Heterogeneous Network Based on BTRON HMI.- Pitfalls on the Road to Portability.- Realization of the Micro-CTRON Kernel under pSOS +.- List of Contributors.- Index of Keywords.