Canon makes several series of non-SLR digital cameras; each line of cameras begins with a letter-number designation. The A series is the entry-level tier; they're the least expensive but they also lag in features. The Sx00 Elph series is the most compact. The Sx series is mid-tier—larger and more powerful. The G series is the top: it has a lot of the EOS features but lacks interchangable lenses.
I hesistate to list this one because it was dead when I got it. It was dropped by the previous owner and it now gives the dreaded "Lens error" when you turn it on, which means something's whacked out with the focus/zoom motors. Of course it costs more to repair than to replace, so that's it. It's now just a piece of industrial art.
I've been having a hard time thinking of what to write about it. Canon makes a lot of A-series Powershot cameras and makes small, incremental changes in successive models; there's nothing particularly noteworthy or special about this one. It is (was) a good camera, but it's a me-too camera in Canon's own line.
For more information: Canon Camera Museum
Camera manual: Orphan Cameras.com