Finding HTML Elements in Watir

TextBox:
   
IE.text_field(how, what)

Button:

IE.button(how, what)

DropDownList:

IE.select_list(how, what)

CheckBox:   

IE.checkbox(how, what)

RadioButton:   

IE.radio(how, what)

HyperLink:   

IE.link(how, what)

Form:   

IE.form(how, what)

Frame:   

IE.frame(how, what)

And many, many more (div, label, image, etc…)…