The authentication server also calculates a response. 认证服务器也计算应答口令。收藏
Counting keyboard: A phototypesetting input keyboard which calculates character width and spaces used and indicates space left in a line . 计字键盘:照相排字机的一种键盘，它计算每个字符和字隔的宽度，并显示该行字长余下的空位。收藏
