RAM URLs:

HowStuffWorks.com
Random access memory allows you to select any specific cell of memory without having to work through a series of sequential memory cells. The most common type of computer memory is dynamic random access memory (DRAM), consisting of both transistors (lets the memory chip read or change the capacitor) and capacitors (holds the information). The dynamic RAM requires refreshing by the CPU or memory controller constantly, so that the capacitor is not emptied of what it is storing.

WiseGeek.com
RAM temporarily holds the data, operating system and application programs, losing the data when the computer is turned off. Like short-term memory, it stores the data that you are currently working with, having a limit on the amount of information that it can work with at one time before slowing down your computer’s ability to process information. RAM holds just a fraction of the data that the hard drive is able to hold, but allows your computer to process data much more quickly.

TechTarget.com
While RAM holds memory only as long as the computer has power, it transfers the data to the hard drive upon proper shut down. The user can improve RAM storage and performance by adding sticks of RAM to motherboard, as long as the motherboard is compatible with the type of RAM and has not exceeded its RAM limit. The user should consider the type of RAM that is being used before purchasing a specific motherboard, ensuring that the motherboard has the capability to upgrade and expand to these new types of RAM.

TV Tuner Card

Product	Price	Resolution	Input	Output	Misc. Features
Sabrent SBT-TVFM PCI Capture Card	19.99	720x576	TV, S-VHS, Composite, Audio, FM Signal	Audio Output	Favorite channel list, tv/video display, teletext decoding, plug and play
Diamond TVW600PCIEV TV Wonder HD 600 HDTV Tuner	39.99	HDTV	Stereo audio, composite video, s-video		DVD playback and autoring software, auto color and gain control, ATI Theater Video Converter
AVerMedia AVerTV Bravo Hybrid TV Tuner PCI-Express Card	49.99	1080i/720p	75 O TV Antenna, S-Video, Composite video, Audio L/R, FM		Multi-card support, Real-time H.264 recording support, 32/64-Bit driver support, Clear QAM support (Digital Cable)

I would select the first TV Tuner card because of the selection of inputs at the low price. I do not have the capability to play video at an HDTV resolution, so a TV Tuner that has this capability is not important. I also am swayed by a deal, and so testing it for $19.99 would be worth the price. If I found that I required more capabilities, I might try upgrading to something more expensive. This was the only card that I did not know about, so I thought it would be interesting to research. I would purchase this card more out of curiosity than necessity or desire, so cheaper would be my priority.