AMIBIOS 8 is a version of AMIBIOS developed by American Megatrends released in 2001. It is the last version of AMIBIOS and was mostly replaced by American Megatrends' UEFI solution, Aptio in the early-2010s (although Aptio came out much earlier).
AMIBIOS 8 was used very widely on a variety of motherboards and computers in the 2000s. It's users include (but are not limited to) ASUS, ASRock, MSI, ECS/PCChips/Matsonic and Soltek.
Pre-release versions
Main page: AMIBIOS 07.00.xx
AMIBIOS 8 is believed to be the final product for AMIBIOS 07.00.xx, due to 07.00.xx not being widely used (suggesting it was likely a limited public pre-release version) and many similarities between both versions. AMIBIOS 07.00.xx is believed to be a family of public pre-release versions of what later became AMIBIOS 8 (except for 07.00.10, which is actually believed to be based on the older AMIBIOS 6 codebase).
AMIBIOS 8 originally could've been planned to be named AMIBIOS 7, however as the AMIBIOS 7 name was given to AMIBIOS 07.00.10, it could've been renamed to AMIBIOS 8.