Apple Logo - Represented by an sillouette of a real object,an apple.  This logo is mainly seen on computer hardware/software.  I see it on PC computers and laptops, on phones, on MP3 Players, on and in software packages, and even sometimes on shirts.  I believe these logos are placed on computers and music devices , as these are the companies main choice of buissness, and when you see someone with one of these products people will recognize this logo with that stylish product.  The logo has not become to fashionable, as most people recognize the device (IPOD, IPAD, IPhone)  way before they see the logo on the device.

Firefox Logo -  This logo looks like a fox wrapped around the globe. The logo represents how firefox spans the globe.  I see this logo on the web browser itself, at computer conventions, and even on t-shirts. This logo is not seen much outside of internet browser related items and is pretty specific to computer community.

Adidas Logo – This logo is more abstract in form.  This logo accually includes the name “Adidas” as well.  This logo I can see in many different places, I see it on shoes, shirts, keychains, track pants, car decals, and at sporting events.  This logo is very prominent in sporting activities and events, and is an identifier for people to show that they are athletic.  It has become fashionable in the sporting community and the creators try to keep it heavly ingrained within sporting goods and events.