The business world or an industry — the community of firms and professionals in a particular trade or sector.
IT業界では人材の奪い合いが続いている。
In the IT industry, the competition for talent continues.
映画業界は最近大きな変化を迎えている。
The film industry has been undergoing major changes lately.
業界の常識でも、新人にはわかりにくいことが多い。
Even industry conventions are often hard for newcomers to understand.