Which tablet to buy? A GUIDE

 Tablets are at the top of many wish lists but which one to buy? The choice used to be pretty limited, with the iPad dominating the latecomers. But this year, the field is more even, as tablets from Apple's competitors have matured. In addition, Google and Microsoft are diving in with their own tablets, providing more choice. 

The first step in the buying process is to decide on the size of the tablet. They fall into two rough categories: the full-sized tablet, pioneered by the iPad, and the half-size tablet, epitomized by the Kindle Fire. 

Full-sized tablets, which generally have screens measuring about 10 inches on the diagonal, are better for surfing websites designed for PCs, and far better when it comes to displaying magazines and documents. Overall, they go further toward replacing a laptop. They cost $400 and up. 
Half-sized tablets, which have screens measuring roughly 7 inches on the diagonal, are cheaper and lighter, but just as good as full-sized tablets for e-book reading. It's an excellent first computing device for a kid, or a gentle nudge into the digital world for an older adult with little computing experience. This year's crop costs $199 and up, but last year's models are available for less.