商业单位需要容易记忆的电话号码，有一些方法可以让电话号码变得更容易记忆。譬如，可以把电话号码写成单词或短语，如 TUT-GLOP 可以代表滑铁卢大学的电话。有时仅仅是把号码的一部分写成单词，如打 310-GINO 便可向 GINO 比萨饼店定购比萨。另一种让电话号码容易记忆的方法是将数字用一种容易记的方式组合起来，譬如 3-10-10-10 也可以代表 GINO 比萨饼店。



电话号码的标准形式是七位十进制数字，在它的第三位和第四位之间用连字符连接(例如：888-1200)。电话的键盘提供了字符于数字之间的映射关系，如下所示：





2

A、B和C

3

D、E和F

4

G、H和I

5

J、K和L

6

M、N和O

7

P、R和S

8

T、U和V

9

W、X和Y



Q 和 Z 没有映射到键盘，而连字符不需要被拨打并且可以根据需要添加和删除。TUT-GLOP 的标准形式是 888-4567，310-GINO 的标准形式是310-4466，3-10-10-10的标准形式也是 310-1010。



如果两个电话号码有相同的标准形式，那么这两个电话号码是相同的。-commercial units need easy to remember telephone numbers, there are ways to allow more telephone numbers easy to remember. For example, telephone numbers can be written words or phrases, such as pseudodynamic - GLOP can represent the University of Waterloo calls. Sometimes numbers is only part of the written word. if the fight 310-GINO will be able to GINO pizza shop ordering pizza. Another phone number so easy to remember the method is to use a number of easy to remember the combination. For example 3-10-10-10 can also represent GINO pizza shop. The telephone number is the standard form seven decimal digits. in its third and fourth between connecting with characters (for example 888-320-4234-1200). Telephone keyboard characters in the digital mapping between, as follows : 2 A, B and C, D,