Understanding Screen Resolutions

Do you know these screen resolutions

1366 x 768 = HD Ready
-Most of the laptops today have this resolution

1280x720 - HD
- Canvas HD, Redmi 1S

1920 x 1080 - Full HD
- Canvas Turbo, Knight and most of the high end devices.

2560 × 1440 - QuadHD
Note 4, LG G3

3840 × 2160 - Ultra HD
- UHD TVs