[计] minicomputer operation system

xiǎo xíng jì suàn jī cāo zuō xì tǒng ㄒㄧㄠˇ ㄒㄧㄥˊ ㄐㄧˋ ㄙㄨㄢˋ ㄐㄧ ㄘㄠ ㄗㄨㄛ ㄒㄧˋ ㄊㄨㄥˇ