The Yale romanization of Cantonese was developed by Parker Po-fei Huang and Gerald P. Kok and published in 1970. Unlike the Yale romanization of Mandarin, it is still widely used in books and dictionaries, especially for foreign learners. It shares some similarities with Hanyu Pinyin in that unvoiced, unaspirated consonants are represented by letters traditionally used in English and most other European languages to represent voiced sounds. For example, is represented as b in Yale, whereas its aspirated counterpart, is represented as p.