You can work with others. Develop point-of-sale software to improve efficiency at crowded stores. Cell phone software can make markets more efficient and prev

You can work with others. Develop point-of-sale software to improve efficiency at crowded stores. Cell phone software can make markets more efficient and prevent price-setting that farmers suffer from. Then there's medical records software. All of these 1) require some domain expertise, even if small 2) are conceptually simple, but the delivery is hard