If you want to use cable or DSL, an Ethernet card will make the connection easier. You need at least two. Everything else is window dressing. Note that I'm suggesting a Pentium III or Athlon-based processor, which is essentially all you can buy these days. Make certain that the RAM's speed is at least 133 megahertz, since the speed of the RAM determines how fast the memory can write.
More storage space means more games can be loaded and accessible at any time.
Again, if you can score a card with 64 megabytes of memory, you'll be happy. Most software these days still comes on standard CDs, and it will for some time. Of all computers, the small business PC needs the least amount of components to be fully functional. This PC is all business, and it shows. At this level of processing power, you can expect applications to run beautifully.