I will be the first to say that I am really new to UNIX and trying to understand the dynamics of how this free source operating system works. The system requirements are not the same as if you try to compare it to Windows. The two UNIX versions I chose to compare is Hewlett-Packard HP-UX and Sun Solaris, I will try to show what requirements each demand and their differences. The Hewlett-Packard HP-UX functions on most 32-bit workstations and servers, the HP-UX can also work on 64-bit systems but only versions 11.x or higher. For the HP-UX the amount of disk space required ranges from 300 to 800 MB which is not a lot. The amount of memory needed is for a minimum of 64 MB of RAM, but the recommended amount is 128 MB. All HP graphics are supported for this system as well as all HP input devices are compatible. As far as networking most are supported as well as I/O adapters. However once HP came out with their HP-UX version 11.00 some of the requirements changed. The minimum disk space went up to 500 MB which is little higher increase compared to the previous 300 MB. The recommended also jumped from 800 MB of disk space to about 1 Gigabyte. Also the memory demands increased from 64 MB of RAM minimum to 128 MB (Weissman, 1999-2012) of RAM. The recommended amount jumped from 128 MB of RAM to 256 MB of RAM (Weissman, 1999-2012). The graphics 3D software that is used is OpenGL2 which seems to be the standard.
Now I am going to speak about another version of UNIX called Sun Solaris and how the hardware requirements stack up to that of the HP-UX. On the surface the Sun Solaris runs on x86_64 based processor (AMD64 or EMT64) architecture. For Windows systems hardware Intel Pentium compatible processor or a multi-processor based system would be ok. It must have At least 3 GB of free disk storage (for a typical installation), 200 MB temporary directory space, 200 MB partition size in the C:\ drive, and 300 MB in the instance