[milky30]

Hi

I will be using the device mainly to read scientific articles. They are normally PDFs, with a rather compact format (i.e small font size and content spread out across multiple columns per page). So the requirements are:

- Supports PDF. This includes support for advanced functionality, such as adding annotations (highlighting text excerpts, adding memo notes) and efficient searching of the original contents as well as the annotations. KOReader is a good example.
- Has an internet browser. This is important for looking up additional references, opening wikipedia, or even looking up word definitions.
- Supports an outliner-style note-taking app (i.e bulletpoint lists with varying indentation levels, that can be collapsed/expanded). An example here is something like the Obsidian app, which is pretty flexible and gets out of your way.

I realise at this point I'm probably looking at something Android-based. But there are so many "android tablets" on the market, it's hard to know what to choose. I'm worried some might have dodgy screens, not enough RAM, spyware, etc. At the same time, my budget is very limited; in fact, whatever gets recommended, I'd probably try to buy it used from ebay.

Thanks!