The last type of system, the alphabet, is also by far the most common. In alphabets, each sign stands for one segment. Put another way, in an alphabet more or less each vowel and consonant sound has its own corresponding sign. It’s no surprise that alphabets are often considered the most user-friendly type of writing system. Still, all languages change over time, which can lead to differences between how words are spelled and how they are pronounced. As students of English know well, at times learning to spell English words may cause just as much frustration as learning Chinese characters. In sum, any writing system has its good and bad points, and people will always have conflicting opinions about which one is best suited for any given language.