Your iPhone looks like just another drive to your computer, so it is easy to download photos from your iPhone and save them to your My Pictures folder on a PC or to iPhoto on a Mac.
How to download iPhone photos to a PC
When you want to move iPhone photos to a cd or to your computer, you need to connect your phone to the computer with the white USB cable that came with your phone. This is the same cable you use to sync your iPhone with iTunes. To download photos from your phone, you do not need to go through the syncing process or even open iTunes. After you connect your iPhone to your computer, go to My Computer and look at the different drives your iPhone will pop up as a drive. When you click on the drive, you will see a folder. Although you cannot see the iPhone music files or the notes files on your computer, you can see the photo files. T After that, move the photos to your computer the same way you would if you work working with photos stored in the memory of your camera. Right click the folder and copy it to your computer in the file that you use to organize photos. From there, you can start emailing photos or editing pictures.
How to download iPhone photos to a mac
You can use iPhotos to download photos from your iPhone to your Mac. AskDaveTaylor.com has a step-by-step instruction guide with screenshots explaining how to make a folder for your synced photos. When you attach your iPhone to your computer, iPhoto will automatically open and ask you if you want to move your photos from your phone to your computer. If you click the "import" button, your photos will be transferred automatically. Then you can locate them on the disk to make photo CDs and organise pictures. If you just want to download a few photos, you do not need to attach your phone to your computer. You can email up to five photos from your iPhone to your email account at once, and then you can download the photos to your computer from the email that you send to yourself. Just be sure you choose the option to keep your photos at the original size, because the smaller photos will have lower resolutions.