If you are new to computers, you need to learn about Adobe Acrobat. Acrobat is used to read documents that have a .pdf extension. "PDF" stands for "portable document format." It allows you to publish elaborate documents, even books, in electronic format with typeset quality. Acrobat is free. By downloading and installing acrobat you have access to millions of high-quality documents. I have published the poster in PDF format for your convenience.
If you don't already have it installed on your computer, you can install Adobe Acrobat by clicking on the "Download Acrobat" icon I provided in my second post on this thread. After the program downloads, install it by clicking the "Open" button on the download dialog box. Follow the instructions. Once Acrobat is installed, click on the "Click here to download poster in PDF format" link. The poster will open up in Adobe. You can print it from there in high resolution.