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第一百四十三条 本法所称以上、以下、以内，包括本数。，推荐阅读搜狗输入法下载获取更多信息
Updated Category: Information Technology，更多细节参见搜狗输入法2026
The 80286 introduced "Protected Mode" in 1982. It was not popular. The mode was difficult to use, lacked paging, and offered no way to return to real mode without a hardware reset. The 80386, arriving three years later, made protection usable -- adding paging, a flat 32-bit address space, per-page User/Supervisor control, and Virtual 8086 mode so that DOS programs could run inside a protected multitasking system. These features made possible Windows 3.0, OS/2, and early Linux.
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