I use Google Chrome as browser. I like the feature that it autocompletes the web-address when I start to type. e.g. when typing "app" it's autocompleted to "apple.stackexchange.com" and I just need to ...
When typing a recipient's name in the "To:" field, Mail.app will bring up an autocomplete menu showing all email addresses for that recipient (e.g., Home and Work). If I don't pay attention and just ...
in Windows you can put the curser on text box (focus on it) and push down arrow key ( down ) and the list of all text that textbox was remembered was shown, then you can move on them by up and sown ...