abbreviation	meaning	resolution (pixels)	aspect ratio	remarks
QVGA	(Quarter VGA)	320×240	4：3	early mobile phones, etc.
－		512×384	4：3	first Macintosh
VGA	(Visual Graphic Array)	640×480  320×240	4：3  4：3	standard of IBM PC
SVGA	(Super VGA)	800×600	4：3
XGA	(eXtended Graphic Array)	1024×768	4：3	usual projectors
WXGA	(Widescreen XGA)	1280×720	16：9
SXGA	(Super XGA)	1280×1024	5：4
UXGA	(Ultra XGA)	1600×1200	4：3
FHD	(Full High Definition)	1920×1080	16：9	Full HDTV
WUXGA	(Widescreen UXGA)	1920×1200	16：10
QHD	(Quad HD)	2560×1440	16：9	720p HDTV x 4
4K UHD	(4K Ultra HD)	3840×2160	16：9	4K TV
DCI 4K	(Digital Cinema Initiatives 4K)	4096×2160	1.9：1	4K digital cinema

 Comparison of the screen sizes (in 50% scale)

* An element of the picture is called pixel. This is a coined word made up of pics/pix and element.
* Aspect ratio means the width-to-height ratio of a screen or of an image.
* The screen resolution (pixels per inch=25.4 mm) was assumed to be 72 pixels / inch on early Macintosh and 96 pixels / inch on Windows as the system value. However, the pixel size of the liquid crystal has recently become much finer than these values, and it is now possible to set the screen resolution arbitrarily on the OS side or the application side in order to display the real size correctly.

model	resolution (pixel)	aspect ratio	remarks
up to iPhone3G	480×320	3：2	half of VGA
iPhone4	960×640	3：2	2x VGA
iPhone5	1136×640	1.775：1	almost 16:9
iPhone6	1334×750	1.779：1	almost 16:9
iPhone6 plus	1920×1080	16：9	Full HD
iPad, iPad2, iPad mini	1024×768	4：3	XVGA
iPad the third generation and later	2048×1536	4：3	4x XVGA

* Android smartphones vary by model, but most are 16:9.
* Most Android tablets have 16:10.

abbreviation	meaning	number of scanlines	scanlines/ frame rate	resolution	aspect ratio	remarks
NTSC	(National Television System Committee)	525	480/60i	640×480	4：3	North America, Middle America, Japan, Taiwan, South Korea, etc.
PAL	(Phase-Alternating Line)	625	576/50i	768×576	4：3	Europe, etc.
SECAM	(Séquentiel Couleur Avec Mémoire)	625	576/50i	768×576	4：3	France, Russia, etc.
HDTV	(High Definition Television)	1125 1125 750	1080i 1080i 720p	1920×1080 1440×1080 1280×720	16：9 16：9 16：9

* NTSC has 525 scanlines, of which 480 are effective. PAL has 625 scanlines, of which 576 are effective. HDTV has 1125 scanlines, of which 1080 are effective.
* 60i means interlaced 60 field / sec = 30 frame / sec, and 50i means interlaced 50 field / sec = 25 frame / sec, and p means progressive.
* In the above, 60 is exactly 59.94 and 30 is exactly 29.97, but 60 and 30 have been used for simplicity.
* In the above, i and p means 60i or 50i and 60p or 50p, depending on the region.
* For reference, the movie is 24p (24 frame / sec) and the aspect ratio is 2.35:1 in a cinemascope mode.
* A single-lens digital camera has an aspect ratio of 3:2. The size of imaging surface is 36mm x 24mm for a full-size camera.

abbreviation	resolution	aspect ratio	video encoding	medium
DVD-Video/DVD-VR  (SDTV)	720×480/60i	4:3/16:9	MPEG-2	DVD
DVD-Video/DVD-VR  (SDTV)	720×576/50i	4:3/16:9	MPEG-2	DVD
HDV	1440×1080i 1280×720p	4:3/16:9	MPEG-2	digital video camera (DV tape, etc.)
AVCHD	various	4:3/16:9	H.264 (MPEG-4 AVC)	digital video (memory, etc.)
BDMV/BDAV	various	4:3/16:9	MPEG-2 H.264 (MPEG-4 AVC)	BD

 * In the above, i and p means 60i or 50i and 60p or 50p, depending on the region.
 * DVD / video camera / BD display a 4:3 or 16:9 screen by making the pixel shape rectangular rather than square.