# Which RCM are most common? **URL:** \ **Category:** Rabbit\ **Tags:** rcm\ **Created:** [September 22, 2020, 7:42am UTC](https://forums.digi.com/t/which-rcm-are-most-common/21806 "2020-09-22T07:42:56Z")\ **Posts on this page:** 4\ **Page:** 1
**Author:** ![spth](https://avatars.discourse-cdn.com/v4/letter/s/7c8e57/32.png) [@spth](https://forums.digi.com/u/spth)\ **Post date:** [September 22, 2020, 7:42am UTC](https://forums.digi.com/t/which-rcm-are-most-common/21806/1 "2020-09-22T07:42:56Z")
I wonder which RCM are the most common, since I want to create some small sample programs for Rabbit development using SDCC and OpenRabbit. ---
**Author:** ![mvut](https://sea2.discourse-cdn.com/flex016/user_avatar/forums.digi.com/mvut/32/31_2.png) [@mvut](https://forums.digi.com/u/mvut)\ **Post date:** [September 22, 2020, 7:54am UTC](https://forums.digi.com/t/which-rcm-are-most-common/21806/2 "2020-09-22T07:54:20Z")
This is something that you should talk to Digi Sales about. They can answer your questions or obtain the answers for you. ---
**Author:** ![Campbell](https://avatars.discourse-cdn.com/v4/letter/c/97f17d/32.png) [@Campbell](https://forums.digi.com/u/Campbell)\ **Post date:** [September 22, 2020, 9:50am UTC](https://forums.digi.com/t/which-rcm-are-most-common/21806/3 "2020-09-22T09:50:50Z")
Recommended for new development is the RCM6000 products like the RCM6700, this uses Dynamic C 10.72E which is the latest running software for this product. ---
**Author:** ![spth](https://avatars.discourse-cdn.com/v4/letter/s/7c8e57/32.png) [@spth](https://forums.digi.com/u/spth)\ **Post date:** [September 22, 2020, 1:47pm UTC](https://forums.digi.com/t/which-rcm-are-most-common/21806/4 "2020-09-22T13:47:06Z")
On the other hand, SDCC currently only supports Rabbit 2000 and Rabbit 3000, so I’ll start with RCMs for those. Of course, one could still use a Rabbit 4000 / 5000 / 6000 in Rabbit 3000 mode.