Many commertial apps have options to run apps at logins... Is there any cross-platform way to do so in python or other languages?

Many commertial apps have options to run apps at logins... Is there any cross-platform way to do so in python?

Is there any mechanical engineers? What you would wish to know when you were starting learning? What skills and topics you consider the most useful in mechanical engineering?

What is the fastest way to learn mechanical engineering in the nowadays when 3d printers are avaliable to be able to design and make custom clocks, engines, generators?

Is there any mechanical engineers? What you would wish to know when you were starting learning? What skills and topics you consider the most useful in mechanical engineering?

What is the fastest way to learn mechanical engineering in the nowadays when 3d printers are avaliable to be able to design and make custom clocks, engines, generators?

Have anybody tried to do accounting on their own in Czech Republic? I would like to start a small reselling business, but do not have money for accountant yet. I heard it is possible to do via gov website somehow.

Is there any english instructions available?