The files likely correspond to the following HP part numbers:

basic01.asm 20392-80001 Basic Rev. A source tape
basic02.asm 20392-80002 Basic Rev. A source tape
basic03.asm 20392-80003 Basic Rev. A source tape
basic04.asm 20392-80004 Basic Rev. A source tape
basic05.asm 20392-80005 Basic Rev. A source tape
basic06.asm 20392-80006 Basic Rev. A source tape
basic07.asm 20392-80007 Basic Rev. A source tape
basic08.asm 20392-80008 Basic Rev. A source tape
basic09.asm 20392-80009 Basic Rev. A source tape
basic10.asm 20392-80010 Basic Rev. A source tape
basic11.asm 20392-80011 Basic Rev. A source tape
basic.lst 20392-90001 Basic Rev. A source listing
basic.abs 20392-60001 Basic Rev. A binary tape

prepare01.asm 20392-80012 Prepare Basic System Rev. A source tape
prepare02.asm 20392-80013 Prepare Basic System Rev. A source tape
prepare03.asm 20392-80014 Prepare Basic System Rev. A source tape
prepare.lst 20392-90002 Prepare Basic System Rev. A source listing
prepare.abs 20392-60002 Prepare Basic System Rev. A binary tape