When you are ready to buy a new computer for yourself or someone else there are many things that you should consider when purchasing one. The internal part of the computer should play the biggest role in making a purchase decision. The outside of the computer (or how it look) also plays a significant part with some people, but is not the most important one.
The inside of the computer (ie. the parts it contains) should be observed very carefully. The first thing you should look at is the motherboard built that is in the computer. That is, does is have expandability ability or in other words are you able to enhance the parts of the computer to improve your computer to a faster, better, and more stable machine.
The second thing you should think about is the speed of the main processor (CPU), which play a significant role in your computers overall performance. The faster the CPU is (ie. the more MHz/GHz it has) the better the processor, which indicates improved efficiency in doing everyday things.
The third thing you should take into consideration is the amount of RAM (Random Access Memory) that the computer has. The more RAM a computer has the "smoother" the working with it becomes, especially if you intend to run multiple programs at once, play games, or make complex drawings (which can take up alot of RAM space to do). Sometimes you will find that even if your computer isn't overally a fast one, adding more RAM to it would improve the productivity of your computer by allowing you to work with more programs at once, that it can become less prone to "crashing", and that it can become more responsive.
Another thing that shouldn't be overlooked is the Video Card that you can put in your computer. Some motherboards already have video cards integrated in them, which is in most cases a good thing which will let you do basic things with your computer, e.g. e-mail, browse the internet, write letters, etc., but sometimes you might require a bigger/better video card to play DVD's, music, games, draw complex drawing, etc. So, you should check that you are able to upgrade your computer with a better video card that would/will suit your needs better if need be.
The last, but not the least, thing you should think about is the size of the Hard Drive (ie. personal storage) of your computer. Some computers have very large storage space that you could use for storing e.g. photos, videos, music and any other file that you can think of. Other computers have quite small storage, which will allow you to do basic things on them e.g. store written/scanned documents, e-mails, etc. Once again you should check if you are able to expand your computers storage if you think you will need it for other things mentioned above.
At the very last, the size and the quality of the Monitor should be considered since a good monitor can be quite useful to you if you spend alot of your time on your computer as opposed to a not so good monitor, which can make your eyes ache over an extended period of time. The size of the monitor is also a point that should be addressed as very small monitors can make it difficult to read/view the content to its full potentials.
The outside appearance could also making an influence on the buyer's choice of purchase, so I will not overlook mentioning it here. (I do enjoy the looks of different types of computers!), even though its everybody's choice as to what they like to see in a computer.
Just one other little thing that I would like to mention is that a computer should be equiped with a CD-Rom or a DVD drive or even maybe with a CD/DVD RW/W combo for writing your important data onto CD/DVD's, which can at times be very useful. So, keep in mind that there are many other devices that you can attach to your computer to make your life simpler and easier while using your computer (e.g. a USB BackUp/Storage Drive -- very handy so you don't have to carry heaps of floppy drives around with you!).
Thank you and I hope that this information will be usefull when making a decision on purchasing a new computer.
P.S. Pay particular attention to the slot types on the motherboard and the slot types of the your equipment that you might be planning to upgrade your computer with, because NOT all equipment fits into all motherboards e.g. earlier equipment with new motherboard or vise versa.