Triple DES
TDES is slowly disappearing from use, largely replaced by the Advanced Encryption Standard (AES). One large-scale exception is within the electronic payments industry, which still uses 2TDES extensively and continues to develop and spread standards based upon it (e.g. EMV, the standard for inter-operation of IC cards; also called "Chip cards",  and IC capable POS terminals and ATM's).  This guarantees that TDES will remain an active cryptographic standard well into the future.