A computer screen — literally a video display terminal. It comes from the days when a screen was not part of a personal computer at all: one big machine sat somewhere in the building, and each worker had a terminal, a screen and keyboard connected to it, with no real computing power of its own. VDT was the American office word for that screen, and you meet it mostly in safety and health writing from the 1980s and 1990s — rules about eye strain, about how long a worker may sit at a VDT, about lighting and screen glare. Taiwanese students sometimes meet it in exactly that place, in old workplace-safety texts. It is dead in everyday speech now; nobody points at a laptop and says VDT. Say screen, or monitor if you mean the box on the desk. Its British twin is VDU, and the two words mean the same thing — VDT was more common in the United States, VDU in Britain. Say it letter by letter: vee-dee-tee.

（電腦）顯示終端機、螢幕（舊式辦公室／職業安全用語）