Wellm it is ok if you make a separate request wish for slide guitar.
For those who are not sure what is what:
Slide guitar probably was the parent of 'em all, it is said that Portuguese sailors brought it to Hawaii. The people there modified it (raised strings and changed the tuning, named that "slack key") and the lap steel was born. Actually it was not a "steel" guitar, since the first "steel bars" were made of bone. First it was just a flat top acoustic guitar, and then a resonator acoustic guitar:
https://www.youtube.com/watch?v=0o031JMU6K8&index=13&list=RDSIeWcSPbn6o(authentic videos are hard to find), later it became electric
https://www.youtube.com/watch?v=Q4F4vRmZa-M&list=RDSIeWcSPbn6o&index=2In this video you see, why it is called lap steel guitar. Some players put the guitar on a table and played standing up, eventually it became height adjustable legs.
Western Swing and then Country and Western adopted the steel guitar and it became its signature sound:
https://www.youtube.com/watch?v=lwRhznTUoCohttps://www.youtube.com/watch?v=n-m0ivnAFxA (just one example for the background sounds)
At the beginning they had one neck, then two necks, then three...
One example for playing on more than one neck:
https://www.youtube.com/watch?v=FkS7x5lZCCQIn the early fifties some players played with technology and modified their insturment. 1953 Webb Pierce's "Slowly" was the first recording where pedals were audible.
Here is one example of a pedal steel guitar where you can hear the pedal work (if you're trained):
https://www.youtube.com/watch?v=-Y5KzgAWX3wand here the same tune showing the pedal work so you can follow the change of notes:
https://www.youtube.com/watch?v=2zYUF8Isj5Q And as a bonus track, pedal steel in a genre that is definitely not C&W:
https://www.youtube.com/watch?v=lUZnlxuXaG4Now listen to slide guitar and hear the difference:
https://www.youtube.com/watch?v=NW08Rc802MQhttps://www.youtube.com/watch?v=Vu0XQVS9GCEhttps://www.youtube.com/watch?v=P-KyHiprcaghttps://www.youtube.com/watch?v=Viqr6KHwJjc