The black and yellow garden spider is a black- and yellow-bodied spider whose back is marked with white. The arachnid in question may be found throughout Canada and the United States of America. It numbers among the most recognizable of garden arachnids.
The distinguishing feature of a brown spider with a zigzag pattern on its back is the presence of a unique marking called a "zigzag" or "herringbone" pattern on its abdomen.
a garden spider
Could be a Black and Yellow garden spider, common the US west coast.
a spider known as a cross spider usaually found in the uk
a little spider black legs and yellow back with black spots
Argiope aurantia Lucas - yellow garden spider
no spider can kill you What?! There are many spiders that CAN kill you! By the way, no, it most likely won't.
grass spider
It sounds like you may have found a Yellow Garden Spider or an Orchard Orbweaver. These spiders are commonly found in Oklahoma and have a distinctive yellow design on their backs. They are not harmful to humans and are beneficial for controlling insect populations in gardens.
The Black Widow Spider has either a yellow, red, or orange hourglass, but sometimes can look like a dot. Links: http://mysite.verizon.net/vzer75kc/
The spider you are referring to is likely the yellow sac spider. Yellow sac spiders are brown with two yellow stripes on their back and are commonly found in California. They are not considered aggressive towards humans but can deliver a painful bite if provoked.