上位 じょうい互換 ごかん せい
jōi gokansei

Noun

1. downward compatibility; backward compatibility; compatibility with input or components intended for lower tier or older systems, versions, etc. — explanation

きゅうシステム よう かれたソフトとの上位 じょうい互換 ごかん せい たもつのは大切 たいせつです。
kyūshisutemuyōni kakareta sofutotono jōigokansēo tamotsu nowa taisetsudesu.
It is important to maintain backward compatibility with software that was written to run on the former system.
Noun

2. upward compatibility; forward compatibility; compatibility with input or components intended for higher tier or later systems, versions, etc. — explanation

Related to 下位互換性