Assembler Inside and Out, 1992

The Complete Guide to IBM PC AT Assembly Language, 1987

Harley Hahn Teaches the Internet, 1999

Harley Hahn Teaches the Internet - Second Edition, 2000

Harley Hahn's Internet Advisor, 2001

Harley Hahn's Internet & Web Golden Directory, 1998 Edition, 1998

Harley Hahn's Internet & Web Golden Directory, 1999 Edition, 1999

Harley Hahn's Internet & Web Golden Directory, 2001 Edition, 2001

Harley Hahn's Internet & Web Yellow Pages, 1997 Edition, 1997

Harley Hahn's Internet & Web Yellow Pages, 1998 Edition, 1998

Harley Hahn's Internet & Web Yellow Pages, 1999 Edition, 1999

Harley Hahn's Internet & Web Yellow Pages, 2000 - Millennium Edition, 2000

Harley Hahn's Internet & Web Yellow Pages, 2001 Edition, 2001

Harley Hahn's Internet Golden Directory, 2002 Edition, 2002

Harley Hahn's Internet InSecurity, 2002

Harley Hahn's Internet Yellow Pages, 2002 Edition, 2002

Harley Hahn's Internet Yellow Pages, 2003 Edition, 2003

Harley Hahn's Read Me First Guide to the Internet, 1999

Harley Hahn's Student Guide to Unix - Second Edition, 1996

The Internet Complete Reference (with Rick Stout), 1994

The Internet Complete Reference (with Rick Stout) - Second Edition, 1996

The Internet Golden Directory (with Rick Stout) - Second Edition, 1995

The Internet Yellow Pages (with Rick Stout), 1994

The Internet Yellow Pages (with Rick Stout) - Second Edition, 1995

The Internet Yellow Pages (with Rick Stout) - Third Edition, 1996

Mastering Xenix on the IBM PC AT, 1986

Norton, Peter - Inside the IBM PC and PS/2 (contributor) - Third Edition, 1990

Norton, Peter - Inside the IBM PC and PS/2 (contributor) - Fourth Edition, 1991

Norton, Peter - Outside the IBM PC and PS/2 (contributor), 1992

Norton, Peter - Peter Norton's DOS 5 Guide (contributor) - Fourth Edition, 1991

Norton, Peter - Peter Norton's Guide to Unix (with Peter Norton), 1991

Open Computing: Unix Unbound, 1994

A Student's Guide To Unix, 1993

The Unix Companion, 1995