noun which may take the genitive case particle 'no', noun
fully compatible
Technical term used in computing, electronics, and engineering to describe components or systems that can work together without any modification or limitation.
This printer is fully compatible with both Windows and Mac.
The new part is fully compatible with the old model.
互換性 is the general noun for 'compatibility', while 完全互換 emphasizes full, unrestricted compatibility.
上位互換 means 'upward compatible' or 'superior compatible', where a newer version can replace an older one without loss of functionality.
Compound of 完全 (kanzen, 'complete') and 互換 (gokan, 'interchangeable, compatible'). The term is a modern technical coinage, likely influenced by English 'fully compatible'.