You're looking for numbers that would be stored and used as strings, I'm assuming. These would include any ID/serial/address/account numbers like an IP address, a phone number, a social security number, a driver's license or credit card number, etc. Basically anything upon which it wouldn't make sense to perform a mathematical operation. Ages and birthdays are not examples of this. Even a date is really a time measurement, which is a number, because it can be added or subtracted from other dates (for example, age = current_year - birthday).

These answers are as poorly reasoned as the question is posed. If, for

example, I would not 'treat a telephone number as a number', the computers that

enable the efficient switching, billing, and transmission of the calls are based on

numeric routes. Mail is sorted numerically, and if they are not treated as integers,

they have some of their properties. Credit card numbers can be added together

and checked for validity. Banks surely treat them numerically.

Zeller's congruence is a famous program that shows how to find the day of the

week from the date, and one of the programs in Knuth, TAOCP, vol.I, is the

Gregorian method of calculating the date of Easter. Some numbers are symbols,

and some are strings, sure. But it's meaningless to say: "not treated as numbers."

>

>John (gnujohn) [If not meaningless, then imprecise, which is worse.]

Well, a list of phone numbers is not really treated as number. You would never add 2 phone numbers together. Same thing for zip codes.

zip codes

phone numbers

credit card numbers

highway route numbers

Interstate freeway numbers (not mileage numbers)

Sports team shirt numbers

i'm puzzled. numbers are numbers. colors are colors. your age is a number. your hair is a color.

! @ # $ 5 ^ & * ( 0

255.255.255.0 <------ not numbers but a bit mask