Translation guide
A computer terminal with built-in processing capability, not just a dumb display. In Japanese, this is typically expressed with the loanword インテリジェントターミナル or the more technical 高機能端末.
Refer to a terminal device that can process data independently, as opposed to a simple input/output device.
The most direct and common translation, widely understood in IT contexts.
This system uses intelligent terminals.
A more descriptive Japanese term meaning 'high-functionality terminal'. Used in technical documentation.
Sometimes used, but 'smart terminal' can also refer to modern smartphones/tablets. Context-dependent.
The term 'intelligent terminal' was more common in the 1970s-1990s. In modern contexts, devices are often just called 'terminals' or specific names like 'thin client'. If you're referring to modern devices, consider whether 端末 (たんまつ) alone is sufficient.
By introducing intelligent terminals, processing speed improved.
Back then it was called a smart terminal, but now it's no different from a regular PC.