The RCA
Its name comes from "Radio Corporation of America" and, also known as a phono (phonograph) or cinch connector, is an electronic connector whose function is to transfer audio and video signals. They are color-coded usually with white, red (which transport left and right audio) and yellow which is for the video. When a high-end camera and audio recorder have the option of transferring through all three channels, the quality is higher. They transmit analog (non-digital) signals, and are not only used with camcorders but with TVs also.
FireWire
The official name is IEEE 1394 and it serves to "to connect different pieces of equipment so they can easily and quickly share information" (Tyson, Layton). It was first created by Apple in 1995 but then in that same year it became a universal networking standard. It is most commonly used to connect video recorders to computers but it can also be used to connect a computer to another computer. In many occasions it is compared to the USB due to its similarity. One advantage of using it is that is comes at a low cost.
Thunderbolt
"Thunderbolt technology is the fastest way to transfer data between a PC and peripheral and display devices. At 10 Gbps, Thunderbolt™ technology delivers great responsiveness with data and display transfers – in each direction, at the same time – using a single cable to connect devices in a daisy chain." That's how the official webpage describes the product. The creation by Intel concentrates mostly on speed and user-friendliness and from the collaboration of Apple, it is able to transfer a full HD movie in less than 30 seconds. (10 Gbps). It transfers video, audio, images and other medio from/to your PC to/from devices such as phones, iPods (mp3 players)... For more information watch the video at https://www.youtube.com/watch?v=xcheaef1Gi8#t=49.
USB (2.0, 3.0)
Probably the most It stands for "Universal Serial Bus" and is a port used to connect peripheral devices (mice, video connectors, memory sticks...) USB 2.0 and 3.0 are used in the same way and are compatible with each other but 3.0 is newer and is claimed to work 10 times faster than the previous model.
Bibliography
N.a."Thunderbolt™ Technology | Thunderbolt Technology Community."Thunderbolt™ Technology | Thunderbolt Technology Community. Intel Corporation, n.d. Web. 03 June 2014.
Nerney, Christopher. "What's the Difference between USB 2.0 and 3.0?" IT News, Technology Analysis and How-to Resources. N.p., 2013. Web. 03 June 2014.
Siegchrist, Gretchen. "What Is an RCA Cable? - Glossary Definition."About.com Desktop Video. N.p., n.d. Web. 03 June 2014.
Tyson, Jeff, and Julia Layton. "HowStuffWorks "How FireWire Works""HowStuffWorks. N.p., n.d. Web. 03 June 2014.