It is named after the Swedish astronomer Anders Celsius (1701â1744), who developed a similar temperature scale. The degree Celsius (Â°C) can refer to a specific temperature on the Celsius scale as well as a unit to indicate a temperature interval, a difference between two temperatures or an uncertainty.n science and in engineering, the Celsius scale and the Kelvin scale are often used in combination in close contexts, e.g. ...a measured value was 0.01023 Â°C with an uncertainty of 70 ÂµK.... This practice is permissible because the magnitude of the degree Celsius is equal to that of the kelvin.
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Home > Consumer Services > AARP. AARP Toll Free 1-800 Number Support & Contact: 1 800 AARP Phone Number Look Up. What is the 1-800 number for AARP? Below is a list of toll free 800 numbers for AARP. General Contact Information: 1-888-OUR-AARP (1-888-687-2277) Phone Menu Transcription: If you call the number above you will get the options below. Welcome to AARP, are you calling about an existing AARP membership? Yes. Main menu, please say if you are calling for; AARP products and services, insurance, order membership cards, or check expiration date, if you want to talk with someone, say representative.