Originally the camera icon was used for a file of transfered media from a camera to a PC.
Used in Windows XP.
Used in Windows Vista and 7.
Since phones and other devices like PCs had cameras, the camera became an app for taking photos.
Used in Windows Phone 7.
Used in Windows 8 and Windows Phone 8.
Used in Windows 8.1.
Used in Windows 10.
Used in Windows 10 Mobile.
Final version used in Windows 10X and Windows 10.
Microsoft Windows apps
3D Builder | Alarms & Clock | Battery Saver | Calculator | Calendar | Camera | Clock | Console | Data Sense | Defender | File Explorer | Fresh Paint | Games | Groove Music | Mail | Maps | Messages | Movies & TV | Notepad | Paint (3D) | People | Phone | Photos | Settings | Sticky Notes | Storage Sense | Microsoft Store | Tips | Wallet | WordPad