Not very easily. Concise, easy to understand and correct explanations of how modern money (arguably since 1971) works are not easy to come by, and also the system just is a bit weird and counter intuitive. (Concise, easy to understand, but wrong explanations are, of course, all over the place. Almost everybody thinks they know how money works. Almost nobody actually does.)
One source that explains some of it would be "Debt: The first 5000 years" by David Graeber, but a) it's a fairly lengthy book with quite a lot of historical background and b) it has a fairly strong politicial spin to it.
National debt is basically where money comes from in the first place. Unless you are willing to change the most fundamental, basic nature of how modern money even works, you cannot run a (major) country without debt. It's not even just a question of good or bad fiscal policy, it is literally mathematically impossible.
It's a lot better than the system that just randomly throws in your USB drives with your SCSI/SAS/SATA/PATA drives. Or the systems that calls everything a SCSI drive when it usually isn't a SCSI drive.
Floating Point Unit. The thing that does mathematical operations on floating point numbers. It used come separately from the CPU as an add-on chip, but around the 486 era, manufacturers started integrating it on the same die as the CPU. Of course, as these things go, from the system programmers point of view, there is still no difference between an add-on FPU and an integrated one.
The one pictured here is an add-on FPU for an Intel 80386 CPU.
Homeopathy is not "herbs", though. Compared to homeopathy, herbs as a medication would have seemed lika a sane choice. At least herbs actually do have some medically relevant substances in them sometimes. Probably not the ones you need to treat cancer, but still, a hell of a lot more than the literally nothing that homeopathy brings to the table.
About 20 years ago, Microsoft was found guilty and convicted, because they forced their browser on their users, driving out competitors by abusing their de facto monopoly on PC operating systems. These days, they are doing the exact same thing again, just on an even broader base. I don't even understand how this verdict took so long.
Also, almost all of that is written in C, which is a successor to B, which is a simplified version of the Basic Combined Programming Language. There was never an A.
Last part is highly topical again...