Remember, here all the files are zipped into one file just because of reducing your time.
For instance,
About 10+ Books & instruments are converted into one file so that you don't need to download again and again. You need to a software to open the files. This software's name is rar or zipped opener. If you're android user, you can search on Google by typing rar.apk or zipped.apk and you'll get your software. You can download this software from Here
