The waterfall has been known as the Angel Falls since the Mid-20th century; they are named after Jimmie Angel, a US aviator, who was the first person to fly over the falls. Angel's ashes were scattered over the falls on 2 July 1960. The common Spanish name Salto Ãngel derives from his surname.
Integrated Services Digital Network (ISDN) is a set of communication standards for simultaneous digital transmission of voice, video, data, and other network services over the traditional circuits of the public switched telephone network. It was first defined in 1988 in the CCITT red book.
Acquirer reference number,(ARN), is a unique number that tags a credit card transaction when it goes from the merchants bank (the acquiring bank) through the card scheme to the cardholder's bank (the issuer). This number can be used by issuing banks to trace a transaction with an acquirer.