BC in Raspberry Pi OS 2024

BC is the "interactive algebraic language with arbitrary precision" From GNU. BC is needed for compiling some applications and was missing from Linux distributions including the Raspberry Pi OS. Fortunately some of the latest Linux distributions now have BC installed by default.

Irrigation parts

Irrigation system part prices are weird. Most of the stuff is made in China and looks the same. There is no explanation on the package of why they are different. Here are results from my experiments.
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