最早可称为缩略语的词似乎是1793年的abjad（辅音音素文字），指的是一种用阿拉伯字母代替数字的书写系统。

The first legitimate acronym seems to be a word abjad dating from 1793 refers to a system of notation using the letters of the Arabic alphabet instead of numbers.

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名称只能以英文字母开始，不能是数字或符号。

Names must begin with an alphabetic character, not a number or symbol.

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创建名称时可以使用英文字母、数字和特殊字符，比如下划线(_)。

The names you create can contain alphabetic characters, Numbers, and special characters such as underscores (_). Here are a few things to note about your naming.

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