Credit cards trace back to ancient Mesopotamia with I.O.U. transactions. First store cards were metal plates used by farmers in Old West. Diners Club launched first widely used store card in 1950
Promotion runs September 17-18, 2022 for 50 US residents aged 18+. No purchase or payment required to enter. Only one entry per person allowed
Glass recycling transforms waste into usable products through cullet processing. Internal cullet comes from manufacturing defects, while external cullet is collected waste. Glass must be purified and separated into different colors for recycling. Heat-resistant glass must be excluded from recycling due to viscosity issues
Caller ID transmits caller's number to recipient's equipment during call setup. First defined in 1993 ITU-T Recommendation Q.731.3. Developed by Ted Paraskevakos in 1968, patented 20 times between 1969-1975
21 is the fifth distinct semiprime and second in the form where is a higher prime. It is the first Blum integer and the sixth triangular number. There are 21 prime numbers between 100 and 200. 21 is the smallest number not close to a power of two
First car bumpers appeared in 1897 by George Albert Lyon. Early bumpers were rigid metal bars with cosmetic function. First impact-absorbing rubber bumpers appeared in 1901. Modern bumpers use plastic covers over steel or aluminum reinforcement