Apple reinvented the Tablet computing landscape with its Tablet iPad, competition soon followed with Dell launching Streak, Samsung  joined the fray with Galaxy Tab, Blackberry became the latest entrant with its PlayBook tablet launched earlier this week.

We bring you a feature comparison of these four models

	BlackBerry PlayBook	Apple iPad	Samsung Galaxy Tab	Dell Streak
Screen size	7 inches	9.7 inches	7 inches	5 inches
Resolution	1024 x 600	1024 x 768	1024 x 600	800 x 480
Pixel density (approx.)	170	133	170	187
Platform	BB Tablet OS	iOS 3.2.2 (4.2 in November)	Android 2.2	Android 1.6 (2.1 / 2.2 in future)
Adobe Flash support	10.1	Not Supported	10.1	Not supported
Processor	1GHz dual-core Cortex A9	1GHz Apple A4 (ARMv7)	1GHz Cortex A8	1GHz Snapdragon
Graphics	Unknown	PowerVR SGX 535	PowerVR SGX 540	Adreno 200
RAM	1GB	256MB	512MB	512MB
Internal Storage	16GB / 32GB (unconfirmed)	16GB / 32GB / 64GB	16GB / 32GB	512MB
Expansion	Unknown	None	microSD	microSD
Connectivity	802.11 a/b/g/n, Bluetooth 2.1 + EDR	802.11 a/b/g/n, Bluetooth 2.1 + EDR	802.11 b/g/n, Bluetooth 3.0	802.11 b/g, Bluetooth 2.1 + EDR
Cellular data	3G and 4G promised for future	3G optional (AT&T)	3G (all carriers)	3G (AT&T)
GPS	None	3G models only	Yes	Yes
Camera	3MP front, 5MP rear	None	1.3MP front, 3MP rear	VGA front, 5MP rear
Weight	0.9 lbs	1.5 – 1.6 lbs	0.84 lbs	0.49 lbs

data source : Engadget