backspace key

基本解释

Use key 'BACKSPACE' for an UNDO mode, and 'ESC' to end the game.
使用關鍵的' 退格'一個撤消模式，和'ESC的結束比賽。
And pressing the Backspace key deletes the character before the insertion point.
退格鍵可刪除插入點之前的字符。
If you made a mistake, you didn't have any of these modern features like a backspace key to correct it. You threw away the card and started over.
那時可沒有任何類似“退格”鍵（Backspace key）這樣的現代化功能，如果你出錯了，就沒有辦法更正，衹好扔掉出錯的卡片，從頭再來。
feihen1.blog.163.com

In this case, though, there's a split space bar, whose left end can be programmed as a backspace key (Microsoft's rationale is that your fingers are constantly near the space bar anyway).
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We were using typewriters, where the state of the art way to correct a typo was to backspace and put a strip of white paper behind the key and retype the word.
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