Catty is the English word for a traditional Chinese measurement of weight called a jÄ«n (Chinese characters: æ–¤) in Mandarin Chinese or kan (æ–¤) in Cantonese language used across East Asia, commonly found in wet markets and in supermarkets in Taiwan and Hong Kong. The term catty originated from Malaya where it is equivalent to 604.79 grams (or 1 1/3 pounds avoirdupois), it is also used in Taiwan (600 grams), Hong Kong (604.8982 grams), Thailand (600 grams), and China (500 grams). In Japanese kin, in Minnan kin or kun, and in Malay it is kati.
catty is a small utility to write+read to+from a serial tty device. You can use it in scripts, or directly writing some text to its stdin. With catty you can add in a few seconds serial communication to your shell scripts.