IT puzzle: journey back in time

What is this device?

• acoustic coupler
  
• analogue answering machine
• telephonograph
  

What was the biggest disadvantage of core memory?

• Not scalable
• No non-destructive reading possible
• The data becomes weaker after a short amount of time and disappears
  

This storage might have cost around $ 250,000 at the time. How much would it have cost at today’s prices?

• 3,000 CHF
  
• 3 CHF
  
• 0.03 CHF
  

What is this device?

• Coil of one of the first vaporizers VAPORETH
  
• ERMETH module
  
• Geodetic binoculars INFRARETH
  

What is this device?

• Video player
• Shredder
  
• Tape eraser
  

When was this Apple Macintosh first produced?

• 1976
  
• 1981
  
• 1984