These are the only operating systems and web browsers that the Library recommends and is able to support. Using other browsers, or using earlier versions of these four, may produce unreliable results. For best results use the most recent versions of operating systems and web browsers.
Your PC's operating system should be running at least Windows 7 SP1, Home or Professional edition, and no earlier version. We highly recommend everyone upgrade to Windows 10 if possible.
Apple OS X
Your Mac should be running at least OS X v.10.9, "Mavericks."
You should use only very recent versions of Chrome, Firefox, Microsoft Edge (Windows 10), Internet Explorer for Windows, or Safari for OS X.
Use the Google Chrome site to obtain or update Chrome for either Windows or OS X.
Use the Get Firefox site to obtain or update Firefox for either Windows or OS X.
Use Microsoft Update to update your Internet Explorer for Windows. You shouldn't try to use a version earlier than v. 10.
Tablets and Smartphones
In most cases, the interfaces for all the research services the Library provides have been written for use on current tablets and smartphones. While every possible device and combination of operating system and browser have not been tested, you should be able to use recent Windows, iOS, or Android devices without any problems or lack of functionality. As is true of any computer, OS and browser combination, the more recent the version, the more likely you are to have a good working experience.