Welcome to Fios! Fios is a flexible study tool that combines study notes and flashcards, with a reward system based on the forgetting curve. You can browse my collection ("Hartree") or have your own collection ("My Cards") if you sign in through Google. Here is one of the ways to use Fios! You write a question (or a concept to expound on) on the main side, and the answer (or information) on the flip side. After that, you can revise a card with either X ("don't remember"), O ("remember"), ◎ ("remember well"). The card will then disappear to "Cooldown cards" and appear again in 48 hours. Each revision result affects its familiarity in a certain way. Familiarity is a number from 0 to 50 (higher and lower values also sometimes occur), which shows how well you know the card's contents. You can set the number manually in the full view. To add a card, just click + New card. Clicking this will also open up its full view. Here you can edit tags, familiarity and priority (header's right side); set a card's title (currently limited functionality); delete the card; paint the card's header blue (useful to mark "memo cards", which don't have a question - just use them to commit something to memory by seeing it periodically); edit the contents; and add images. You can also revise cards from the full view. To open up full view at any time, long click the card's contents. Inside the card's text contents (both sides), you can use HTML or the following special tags: *[something]* to mark "something" with green ^[something]^ to mark "something" with pink [img0] to place the image in the first slot [img1] etc. <- or -< to produce ← or → != to produce ≠ [C] etc. to use blackboard bold for mathematics Some examples of the notation I personally use: x2 - give two meanings [x2] - give two readings (la) - specifies that the word is given in Latin [en, la] - translate to English and Latin (uses ISO 639-1) *[something]* with foreign words to ask myself to give their pronunciation ^[something]^ with a phrase to ask myself for its source or who said it ^[something]^ in the flip side (explanation) for mnenomics If I need to compare two notions, "vs" is used; for more than two, I just list the words or notions using commas. To remind myself than two concepts are not the same, I use ≠. Arrows show associations and semantic connections. They're not very strict: they're just that - associations - and could go both ways in most cases. Sentence examples are capitalised, with a period at the end. On the contrary, notes with information statements do not have a period at the end. Word combinations or mnemonics (that don't represent a unique point of knowledge by themselves) are given in quotation marks.