aea7015cd5
Apparently, the convention (at least starting from 2018) is to make the keywords and block names to be in lowercase as stated from one of the following discussions at https://orgmode.org/list/87tuuw3n15.fsf@nicolasgoaziou.fr/. The files was updated with a one liner of shell. However, this is Emacs and org-mode does have an API to let you do stuff in your config and interact with the documents internally so it is not an elegant solution in any way.
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Endianness
Endianness refers to how bits are read and this depends on the underlying hardware architecture. 1
For example, given the following bit, 11010, this could be read as $(1\times2^{0}) + (1\times2^{1}) + (0\times2^{2}) + (1\times2^{3}) + (0\times2^{4})$ or $11$ with the first bit being the least significant also known as little-endian. On the other hand, this could also be read as $(0\times2^{0}) + (1\times2^{1}) + (0\times2^{2}) + (1\times2^{3}) + (1\times2^{4})$ or $26$ with the last bit being the least significant which we refer to as big-endian. 2
Endianness can have subtle effects on various things — e.g., using binary data formats like FITS and HDF — like having the wrong endianness.
To know the endianness of your machine, you can simply create a test number (preferably in binary) and check for the first few digits if it's little-endian — otherwise, it is big-endian.
If you have Python installed, you can simply use sys.byteorder (e.g., python -c 'import sys; print(sys.byteorder)).