Free42isare-implementationoftheHP-42ScalculatorandtheHP-82240printer.
Itisacompleterewrite,notusinganyHPcode,anditdoesnotrequireanHP-42SROMimage.
Free42isanOpenSourceproject.TheexecutablesandsourcecodearereleasedunderthetermsoftheGNUGeneralPublicLicense,version2.
Allthird-partycodeusedinFree42iseitherinthepublicdomain,orlicensedundertermscompatiblewithGPLv2,orusedwiththeauthors'permission.