For one PC:
If you only have one computer on which you want to install Office 2013, this is the option for you. It's designed for one user, using only one PC. This license is not transferable to another PC.
Required Processor - 1 gigahertz (Ghz) or faster x86- or x64-bit processor with SSE2 instruction set
Required Operating System - Windows 8, Windows 7, Windows Server 2008 R2, or Windows Server 2012
Required Memory - 3.0 GB available
Required Hard Disk Space - 3 GB available disk space
Required Display - Graphics hardware acceleration requires a DirectX10 graphics card and 1024 x 576 resolution
Required Software - .NET version 3.5, 4.0, or 4.5
Required Browser - Microsoft Internet Explorer 8, 9, or 10; Mozilla Firefox 10.x or a later version; Apple Safari 5; or Google Chrome 17.x
Additional System Requirements - Multi-touch: A touch-enabled device is required to use any multi-touch functionality. However, all features and functionality are always available by using a keyboard, mouse, or other standard or accessible input device. Note that new touch features are optimized for use with Windows 8.
Other System Requirements
Some functionality may vary, based on the system configuration. Some features may require additional or advanced hardware or server connectivity.
Note: System requirements are rounded up to the nearest 0.5 GB, to be conservative. For example, if we measure an application’s required hard disk space to be 1.99 GB, we recommend 2.5 GB of disk space. Our hard disk system requirements are intentionally larger than the actual disk space usage of the software.
A graphics processor helps increase the performance of certain features, such as drawing tables in Excel 2013 or transitions, animations, and video integration in PowerPoint 2013. Use of a graphics processor with Office 2013 requires a Microsoft DirectX 10-compliant graphics processor that has 64 MB of video memory. These processors were widely available in 2007. Most computers that are available today include a graphics processor that meets or exceeds this standard. However, if you not have a graphics processor, you can still run Office 2013.