Emoticon: "An emoticon is a computer keyboard-generated sign that represents facial expressions. Used in computer-mediated communication, emoticons provide an emotional quality to e-mails, texts, instant messaging, and other Internet communication."
Pictograph: "A method of expression and communication that uses symbols and drawings to convey ideas. The pictograph refers to the symbol(s) used to express these ideas. Ancient hieroglyphs used pictures as a method of communication and are a well-known example of pictographs."