what do these numbers & letters mean for a camera?

im looking to buy a new HD camcorder, and all these letters and numbers are confusing me to death. so if someone can please decipher these for me, i thank you! these are the titles of the cameras I’m looking at.
1. Canon – VIXIA *HF R21 32GB* HD Flash Memory Camcorder – Black
2. Sony – *HDR-CX130/B* HD Flash Memory Camcorder – Black
3. Insignia™ – Refurbished *5.0MP* High-Definition Digital Camcorder with 3" LCD Screen – Dark
4. BlueSamsung – *H300* HD Flash Memory Camcorder – Black
5. Panasonic – *HDC-TM90* 16GB Flash Memory Camcorder – Black
6. Samsung – *Q10* Switch Grip HD Flash Memory Camcorder – Black
7. Canon – VIXIA *HF R20* 8GB Flash Memory Camcorder – Black

I’m basically looking at the whole inventory of cameras, so any help at all with this is appreciated.

2 Responses to “what do these numbers & letters mean for a camera?”

  1. They are just model numbers. They are picked by marketing managers and don’t necessarily mean anything, although some companies have an internal code from which they generate model numbers.

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