This question has 2 answers that I can see.
The first one would be a Dial Up Modem. These devices allow (or allowed, since they're pretty much obsolete) a computer to communicate over the phone lines and access the internet.
The second option for an answer would be a DSL Modem/Router. In a sense, a DSL (Standing for Digital Service Line) is a bit of a predecessor to traditional Dial Up, using a digital telephone line (However not the frequencies used for voice) to connect a computer or set of computers together and to the internet.
Answer:
By the numbers: “The ENIAC contained 17,468 vacuum tubes, along with 70,000 resistors, 10,000 capacitors, 1,500 relays, 6,000 manual switches and 5 million soldered joints. It covered 1,800 square feet (167 square meters) of floor space, weighed 30 tons, consumed 160 kilowatts of electrical power.” More info
Answer:
In some cases, one con is that it can be hard to keep track of your identation when coding long lines or blocks. The pro is that you may need to learn, which is not a bad thing. Learning is good.
