Take context from the input text and decide on the accurate relationship between 'Hotmail' and 'Microsoft' from the options provided.
Options: developer, distributed by, owner of, director/manager

He had worked for Microsoft (NasdaqGS: MSFT - news ) for over 20 years, specialising in more recent years in the sale and marketing of online products MSN Messenger, Hotmail and Bing.
developer