| Specification | OS | CPU | Company |
|---|---|---|---|
| μITRON4.0 | PrKERNEL v4 | ARM7, ARM9, SH-3, SH3-DSP, SH-4, VR4100, TMS320DM270,
TMS320DM320, Nios2, MicroBlaze |
eSOL CO.,Ltd. |
| μMore v4.0 | H8S, SH-3, SH3-DSP, SH4, ARM7 Thumb family, ARM9 Thumb family, XScale | ACCESS Co.Ltd. | |
| Nucleus μiPLUS | Nios2, VideoCore, BlackFin, ARM7, ARM7 Thumb, ARM9,
ARM9 Thumb, ARM11, MIPS, PowerPC, SH3、SH3-DSP, SH4, SH4AL-DSP |
Mentor Graphics Japan CO., Ltd. | |
| mKernel | Z80 | Masayuki Kawakami | |
| RX4000v4 | VR series | NEC Electronics Corp. | |
| ThreadX-μITRON | ARM, StrongARM, Thumb, SPARC, i960, PowerPC, V8xx, 68K,
ColdFire, MIPS, x86PM, M-Core, TriCore, TinyJ, H8/300H, SHx, SH-DSP, TMS320C6x, TMS320C54x, ARC, SHARC, Blackfin |
Grape System Inc. | |
| Emkernel(Nios) | Nios | Hitachi Information & Control Solutions, Ltd. | |
| HI7000/4 | SH-1, SH-2, SH2-DSP, SH-2A, SH2A-FPU | Renesas Technology Corp. | |
| HI7700/4 | SH-3, SH3-DSP, SH4AL-DSP | Renesas Technology Corp. | |
| HI7750/4 | SH-4, SH-4A | Renesas Technology Corp. | |
| HI1000/4 | H8SX | Renesas Technology Corp. | |
| TR19A/ITRON4 | TX19A series | Toshiba Coropration | |
| N-KERNEL | H8, H8S, SH2, V850, ARM7TDMI | Nissin Systems co., Ltd. | |
| RX78K0R | 78K0R | NEC Electronics Corp. | |
| μITRON3.0 | SR900 | SPC900 | Sony Corporation |
| M3T-MR30 | M16C/60, M16C/30, R8C/10 series | Renesas Technology Corp. | |
| Softune REALOS/FR | FR family | Fujitsu Limited | |
| REALOS/SP | SPARClite series | Fujitsu Limited | |
| UDEOS/r39 | TX39 family | Toshiba Information Systems [Japan] Corp. | |
| M3T-MR32R | M32R family | Renesas Technology Corp. | |
| FS.ExRon-ARM | ARM7TDMI series | Firmware Systems Inc. | |
| M3T-MR79 | 7900 series | Renesas Technology Corp. | |
| "Kernel",the kernel for embedded control | Z80 | Masayuki Kawakami | |
| ExRon-SA | StrongARM | Firmware Systems Inc. | |
| ELX-ITRON | ARM7, ARM7 Thumb, ARM9, ARM9 Thumb, SH2, SH3, SH4, H8S,
PowerPC405, Vr41xx |
Elmic Wescom, Inc. | |
| TR19 | TX19 family | Toshiba Corporasion | |
| RX850 | V850 series | NEC Electronics Corp. | |
| RX850Pro | V850 series | NEC Electronics Corp. | |
| RX4000 | VR series | NEC Electronics Corp. | |
| HI2000/3 | H8S | Renesas Technology Corp. | |
| M3T-MR308 | M32C/80, M16C/80, M16C/70 series | Renesas Technology Corp. | |
| TR900 | TLCS-900 family | Toshiba Corporation | |
| μITRON2.0 | Softune REALOS/907 | F2MC-16LX/16L/16/16H/16F family | Fujitsu Limited. |
| AAAOS86 | 8086 | Three Ace Computer Corp. | |
| Softune REALOS/896 | F2MC-8L family | Fujitsu Limited | |
| RX78K/0 | 78K0 series | NEC Electronics Corp. | |
| RX78K/IV | 78K4 series | NEC Electronics Corp. |