Tektronix hex format[2] (TEK HEX[2]) and Extended Tektronix hex format[2] (EXT TEK HEX or XTEK[2]) / Extended Tektronix Object Format[3] are ASCII-based hexadecimal file formats, created by Tektronix, for conveying binary information for applications like programming microcontrollers, EPROMs, and other kinds of chips.
Each line of a Tektronix hex file starts with a slash (/) character,[2] whereas extended Tektronix hex files start with a percent (%) character.
[2][3] A line consists of four parts, excluding the initial '/' character:[1] A line consists of five parts, excluding the initial '%' character: