Hospitals often use code names to alert staff to an emergency. Code blue means a medical emergency. Code red means fire or smoke. Code black typically means there is a bomb threat. Hospitals are the ...

Several versions of Microsoft Outlook ago, you could use color to identify appointments by quickly applying a category. Outlook no longer supports this feature, although, with a little roughhousing, ...

When creating entries in a digital calendar for the first time an obvious action would be to color-code different kinds of events, perhaps by using a popup menu that has categories names and ...