[mannschott]

Enumerations and subranges (in style of Modula-2 and Pascal) are missing from Oberon, but Records are present subject to type extension in the style of structs in Go. In Oberon(-1), we used (pointers to) procedures in record fields as methods when programming in an object-oriented style. Oberon-2 added methods which dispatch dynamically based on type of receiver. These were "type bound procedures". You'll find this idea echoed in Go as well.