Tiêu chuẩn quốc tế

• Số hiệu / Standard Number: ANSI X4.7:1973
• Năm ban hành / Publication date: 1973
• Tình trạng / Status: W - Hết hiệu lực
• Tên tiếng Anh / Title in English: Typewriter Keyboard Arrangement
• Số trang / Page: 12

Phạm vi áp dụng / Scope of standard

This standard describes the arrangement of the 44 basic printing
keys on the typewriter and the characters, uppercase and lowercase,
that appear on the keys. It also includes the two shift keys and
the space bar. However, the standard does not specify the physical
characteristics and dimensions of the keys and keyboard. It relates
to the keyboard arrangement only.

Purpose. The purpose of this standard is to
provide the greatest benefit to the user in the areas of operator
training, purchasing, and interchangeability of machines and
operators.