Respuesta :
Answer: Some features are,
Vacuum-tube technology
Unreliability
Supported only by machine language
Overpriced
A lot of heat generation
Slow input and output devices
Bigger in size
Pick any
Hope this helps!
Answer:
Machine language.
Magnetic tapes and magnetic drums.
Paper tape and punched cards.
Very slow and very large in size (often taking up entire room).
Explanation: