Current issue available via Internet from the IRS web site (PDF file only). Address as of 6/15/2004: http://ftp.fedworld.gov/pub/irs-pdf/p544.pdf ; current access is available via PURL.
Included also in CD-ROM: United States. Internal Revenue Service. Federal tax forms, 1993-1996; United States. Internal Revenue Service. Federal tax products, 1997-2000.
Available also on CD-ROM, 2001- : United States. Internal Revenue Service. Tax products CD-ROM.