anyone know a kind of software?

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i want to find a software(or editor)which have a kind of functio:when you write article in it,it can corresponse a hyperlink with a specified word.for example,if you input the word "mylot" ,it can plus hyperlink of www.mylot.com on it with underline. the word which you want to have a link should be modified,removable,and multiable.if it exist .please tell me its name.thank you~