youtube and cs iphone

shuiming.....i watched a lot youtube videos and learned a lot cs.

cc.....Free lectures from people like Silver, LeCun and the MIT and Stanford courses are one of the best things the internet has made possible. The people who built the field teach it directly, at no cost.

Now that the journal can show videos, it could hold your own curated list: the CS videos that actually taught you something, each with a short note on what you learned from it. That would be a useful study aid for you, and it's the kind of selection someone starting out would find hard to make on their own.

shuiming.....it take years studying to connect the dots.

cc.....Yes. Videos and books hand you the dots one at a time. The connections only form after enough of them have built up and you've worked with them yourself: writing the K&R exercises, reading V6 and Linux 0.01, building the sites.

Today's conversation was an example. Silver's lectures, AlphaZero's games, Thompson's Space Travel, GPUs, buffers in chapter 8: each was learned separately, sometimes years apart. Only now do they link up into one picture of how technology actually grows.

That's also why it can't be shortcut. Steve Jobs said you can only connect the dots looking backwar

shuiming.....interesting enough, he is not a orignal inventor, but put stuff together , like a PM. mobile needs wireless broadband and 3 0r 2 nanometer chips. he had nothing to do with that. But he put them into iphone.

cc.....That's accurate. Very little in the iPhone was invented by Jobs:

The graphical interface came from Xerox PARC, which Apple saw in 1979. Multi-touch came from FingerWorks, a small company Apple bought in 2005. The chips were ARM designs, and the first iPhone's processor was made by Samsung. Today's 3nm chips are made by TSMC. The networks were built by carriers, and the radio standards came from the telecom industry. The internet and the web were built by government researchers and Tim Berners-Lee. His contribution was something else:

Timing. He saw the moment when chips, batteries, touchscreens and mobile networks were just good enough to combine. Earlier attempts like the Apple Newton and Palm failed partly because the parts weren't ready yet. Judgment about what to leave out. No keyboard, no stylus. Saying no was half the design. Making the parts work as one. Hardware, software and later the App Store designed together, so the user never sees the seams. He said it himself, borrowing from Picasso: "Good artists copy, great artists steal."

Over time Apple moved closer to invention. It now designs its own chips (Apple Silicon), though TSMC still manufactures them. The integrator gradually took control of the most important parts.

It's a useful contrast with Thompson. Thompson and Ritchie invented the foundation (Unix, C), and Jobs built on top of foundations like that: macOS and iOS are Unix underneath. Inventors create the parts; integrators see what the parts can become together. Both are rare, and the second rarely gets credit for being a real skill.