Its a free photo editing software, somewhat like Adobe Photoshop. You can do absolutely anything with the picture selected or even create your own art!
GIMP /ɡɪmp/ (GNU Image Manipulation Program) is a free and open-source raster graphics editor used for picture retouching and editing, free-form drawing, resizing, cropping, photo-montages, converting between different image formats, and more specialized tasks.
Following PARC the first GUI-centric computer operating model was the Xerox 8010 Information System (Xerox Star) in 1981, followed by the Apple Lisa (which presented the concept of a menu bar and window controls) in 1983, the Apple Macintosh 128K in 1984, and the Atari ST and Commodore Amiga in 1985.
Oldest version of iOS is 1.0 which was released on 29th June 2007 with build 1A543a and baseband of 03.11.02_G.
it was renamed iOS on June 7, 2010, as, with the introduction of the iPad, and the existence of the iPod Touch, the iPhone was no longer the only device to run the mobile operating system. iOS 4 was the first major release to reflect this change. Apple licensed the "iOS" trademark from Cisco Systems.