These three are compared constantly and they do not do the same thing. One sells live teachers, one sells practice with feedback, one sells a structured curriculum. Choosing between them starts with knowing which of those you actually lack.
How do computers store data? By holding a physical state that can be read back later. A flash cell traps electrons. A hard disk magnetizes a patch of cobalt alloy. A stick of memory holds a charge in a capacitor that leaks within milliseconds and must be refreshed thousands of times per second. Every file … Read more
What is cloud computing? It is the practice of renting computing power, storage, and software from someone else’s building, delivered over a network, billed by the minute or the gigabyte. The cloud is not floating and it is not abstract. It is a warehouse full of servers in a place with cheap electricity and good … Read more
How does wifi work? It converts digital bits into radio waves, broadcasts them on a frequency nobody needs a license for, and relies on a receiver to turn the wobble back into bits. There is no special “internet” in the air. Your router is a very small radio station, and your laptop is a very … Read more
What is an api? It is a set of rules one program uses to ask another program for something, without needing to know how that other program is built inside. The weather app on your phone does not calculate tomorrow’s temperature. It asks a server, in a precisely formatted sentence, and the server answers with … Read more
AI vs machine learning gets treated as a rivalry, or worse, as two spellings of the same thing. Neither is right. Machine learning is one technique inside artificial intelligence, and the two terms describe different levels of a hierarchy that also contains deep learning and, at the bottom, specific model architectures. The distinction is not … Read more
How do large language models work? At the bottom of every chatbot reply sits one repeated operation: guess the next token. A token is a chunk of text — usually a word piece, sometimes a whole short word, sometimes a single character. The model scores every token in its vocabulary, picks one, attaches it to … Read more
Software can run the experiment you cannot build — a vacuum, a frictionless surface, a circuit that would catch fire. It cannot teach that glassware breaks. Here is where the line actually falls.
How do search engines work? Three stages, executed continuously at absurd scale: crawl the web, index what was found, then rank the matches for your query. Critically, you are not searching the live web — you are searching a stored copy that a crawler built, which is why new pages do not appear instantly. Stage … Read more
What is an algorithm? A finite sequence of unambiguous steps that takes an input and produces an output. That is it. A recipe is an algorithm. So is the long division you learned in school, and so is the procedure for sorting a deck of cards. The word sounds intimidating because it gets used loosely … Read more