Perl extension to generate and test check digits

compute check digits modulo 7 method 1

compute check digits for Euro notes

compute check digits for Bahncard (DE), IMEI, IMEISV, ISIN, Miles&More, Payback (DE), Personnummer (SE), Passport (BR), Credit Cards, SSN (US), Samordningsnummer (SE), VAT RN (ES), VAT RN (IT), VAT RN (SE), International Securities Identifikation Number (ISIN)

compute check digits for CINS (US), SIREN (FR), SIRET (FR)

compute check digits for ISMN

compute check digits for 2aus5, EAN, ILN, ISBN13, NVE

compute check digits for Deutsche Post Identcode/Leitcode (DE)

compute check digits for Rentenversicherung (DE)

compute check digits for Sedol (GB)

compute check digits for Betriebsnummer (DE)

compute check digits for Postscheckkonti (CH)

compute check digits UPS (US)

compute check digits for ISBN, ISSN, VAT RN (PT), HKID (HK), Wagon number (BR), NHS (GB), VAT (SL)

compute check digits for PZN (DE)

compute check digits for PKZ (GDR)

compute check digits for CPF (BR), Título Eleitoral (BR)

compute check digits for Código de Cuenta Corriente (ES)

compute check digits for VAT Registration Number (FI)

compute check digits for VAT Registration Number (DK)

compute check digits NRIC (SG)

compute check digits AHV number (CH)

compute check digits for VAT Registration Number (NL)

compute check digits for Bundeswehrpersonenkennnummer (DE)

compute check digits for VAT Registration Number (GR)

compute check digits for ESR5 (CH)

compute check digits vor VAT Registration Number (PL)

compute check digits for EC-No, EINECS, ELINCS

compute check digits for ISAN

compute check digits for DNI (ES)

compute check digits for VAT Registration Number (IE)

compute check digits for Code-39

compute check digits for VAT Registration Number (LU)

compute check digits for VAT Registration Number (BE)

compute check digits for International Bank Account Number (IBAN)

compute check digits for UPC (US)

compute check digits for blood bags (DE), BZÜ (DE), VAT Registration Number (DE)

compute check digits for SICI (Serial Item and Contribution Identifier)

compute check digits for PA (DE)

compute check digits for CAS

compute check digits for DEM

compute check digits for VAT RN (AT)

compute check digits for ESR9 (CH)

compute check digits with Verhoeff scheme