一卡通

Yīkǎtōng
the name of various contactless smart cards, notably Yikatong (mainly for public transport in Beijing) and iPASS (mainly for public transport in Taiwan)

CEDICT

Entry Composition

1 一 yī
  1. one
  2. single
  3. a (article)
  4. as soon as
  5. entire; whole; all; throughout
  6. "one" radical in Chinese characters (Kangxi radical 1)
  7. also pr. yāo for greater clarity when spelling out numbers digit by digit
2 卡通 kǎtōng cartoon (loanword)