Dave Fowler, of uC Hobby, sent us a link to this java app for determining resistor code values. There are a lot of these resistor ID tools floating around, in different formats — it’s nice to have the option to use which one works best for you and your circumstances (for instance, I don’t have a computer at my workbench, so it’s easiest for me to just use my DMM or one of those paper dial IDers I got from Radio Shack several decades ago). But YMMV.

Online Resistor Color Code Tool