The 80386 (usually called '386) was a processor used in PCs especially in the late '80s and early '90s. It was a major milestone for Intel and the PC business, because this was the first fully 32-bit PC processor, which was a huge improvement over its predecessor (the '286). Two main versions were available, the fast and expensive 386DX and the cheaper but less sophisticated 386SX.

The 386SX in its natural habitat. This is a 16 MHz version.

The top-left corner of the IC. It's very busy in here with lots of wires and buses. The big horizontal block is probably a shift register or an arithmetic unit of some sort. Note that Intel's internal part name for the 386SX is apparently 80P9, the number '386' is nowhere to be found on the chip.

A random place in the middle of the chip. A typical picture for a complex digital circuit, with lots of different part and circuits interconnected by wires and buses. Quite amazing how they've managed to design all this using the tools that were available in 1985!

Here's something interesting: if you look closely at the vertical bar in the centre, you'll see that there are letters on it! From top to bottom these are 'DL', 'SG', 'DV', 'DE', 'AE'. What do these mean? Probably they're the initials of people in the design team. Apparently chip designers sometimes hide their name or a symbol of some sort on the chips they make. Maybe they hope someone will one day open up their products and find their hidden messages :-)

Even weirder than letters: an anchor?

This 'JSH' is tilted by 90 degrees for some reason...

JP, KE, AY, nK (?), AC. There are lots of letters scattered around the chip.

VVO, MS, JP, NPS. These look a bit different than the others.