I have been struggling on with my old PC for years. It now has the LinuxLite operating system. I basically use it to access the internet, but it is very sluggish now. Recently I tried one of the projects in Raspberry Pi Geek magazine on a Raspberry Pi, but it failed on the first step, which was to update and upgrade the Raspbian operating system. Once I had done that, there was not enough RAM left to install the other software. At first I thought it was hard disk space it was running out of, which was crazy enough, but it turned out it was RAM. The Raspberry Pi has 900 MB of RAM, most of which became used up after the update and upgrade. The Raspberry Pi is just sitting there, not actually being used for anything, so what is it doing with all that RAM? I decided to look at the RAM usage on my PC, using the "free -m" command. It said my PC had 686 MB of RAM, and only 6MB was free. No wonder it keeps coming to a halt. I suppose I should order some more RAM.