# A.1.2. Notes and resources

:::info
This is a note for notes of the IB Syllabus starting M27. If you want to see more, you should check the note of the teaching material index here:

https://hackmd.io/@dprieto/David-Index#Computer-Science-New-syllabus-first-examination-2027
:::

:::warning
This is not ordered whatsoever yet
:::

## A1.2.1 Binary-hexadecimal

### Binary-decimal-hexadecimal conversion references

{%youtube 8T4F7WboWPQ %}

{%youtube pg-HEGBpCQk %}

https://www.wikihow.com/Convert-from-Decimal-to-Binary

https://www.cuemath.com/numbers/decimal-to-binary/

## A1.2.2 How binary is used to store data

### Numbers

### Characters (and Strings)


https://www.utf8-chartable.de/unicode-utf8-table.pl

### Images


This is the main thing but I also mentioned the difference between raster and vector and also we mentioned YMCK and RGB.

### Audio


https://www.youtube.com/watch?v=nTo4mwd_aKg

Phone calls, that have a worse quality they have a sampling of 8 KHz https://dsp.stackexchange.com/questions/22107/why-is-telephone-audio-sampled-at-8-khz

### Video

https://www.youtube.com/watch?v=J9RemuYxA4s