e/Electronic Serial Number

Information
has gloss	eng: Electronic Serial Numbers (ESNs) were created by the FCC to uniquely identify mobile devices from the days of AMPS in the United States from the early 1980s. The administrative role was taken over by the Telecommunications Industry Association in 1997. ESNs are mainly used with AMPS, TDMA and CDMA phones in the United States, compared to IMEI numbers used by all GSM phones.
lexicalization	eng: Electronic Serial Number
instance of	e/Serial number