Complex sentence: In 2006, ACS's ACR120 contactless smart card readers were adopted by a high-end Japanese supermarket in Hong Kong for its customer loyalty program, which began transitioning from contact to contactless smart card technology in 2005.
Split into simpler sentences: In 2006, ACS contactless smart card readers were adopted by a high-end Japanese Supermarket in Hong Kong for its Customer Loyalty Program. ACS ACR120 contactless smart card readers were used in the new loyalty program, which began transitioning from contact to contactless smart card technology in 2005.