Match these methods of communication with the order in which they were used. 1. Ist used
el PDA
papel y tinta
2. technology introduced in So's
3. technology introduced in 90's
la tarjeta Airport

So we want to connect the methods of communication.

The listed methods are:

Papel y tinta

el PDA

La tarjeta Airport.

And the options are:

1) 1st used

2)  technology introduced in So's  (I guess that there says 80's)

3) technology introduced in 90's

Let's analyze each one of these:

"Papel y tinta" means paper and ink, not much explaining needed here.

"el PDA" refers to the PDA (personal digital assistant). Is a mobile thatworks as an information manager, and the first one was introduced in 1984. But the "peak" of this thechnology was in the 90's.

"La tarjeta Airport" means "the Airport card"

Are wireless cards used to connect to wireless networks. It was introduced in 1999.

Then with that information, we know that the first of these methods used was paper and ink, then:

1) 1st used: Papel y tinta

the first PDA was introduced in 1984, then:

2. technology introduced in 80's:  El PDA

Finally, the Airport card was introduced in 1999, so it was introduced in the 90's, then:

3) technology introduced in 90's : la tarjeta Airport

yo nos habíamos enterado de que los precios de los tiquetes subieron.

btw its yo not ya, ya means already yo means me or in this case us.