Overall looks:

Keyboard:
I teared down the keyboard first with my hand and screw driver. This part is really loose and everything can be separated easily.
Picture 1: Finished

Picture 2: In detail

Generally, there are seven parts in the keyboard.
Parts Name
Materials
Manufacturing method
keyboard Case (black)
Plastic
Injection molding
Keyboard Plate (black)
Plastic
Injection molding
PCB (Printed Circuit Board)
Glass fiber with copper traces, Plastic, Rubber
Photoengraving, injection molding for plastic and rubber
Battery
Stabilizer (small white)
Plastic
Injection molding
screws
steel
Cold forming, Hot forging, Machining
Keycaps
Plastic
Injection molding
PCB processes the inputs from the key switches and sends them to the computer. key board case and plate are used for supporting and holding all the components including the keycaps. Stabilizers are used for stable the keycaps while you pressing them. Usually, the keyboards have mechanical switches looks like this:

For my keyboard, I think they are replaced by the little deformable rubber buttons on the PCB. Keycaps for pressing and screws are used for fixing.
Tablet Computer:
Then, I move to the tablet computer. And the tools are also hands and screw driver. This part is little bit hard to tear down as some screws are in bad conditions.
Picture 1 starting:

Picture 2: Finished

Parts Name
Materials
Manufacturing Method
Mother board PCB: PCB for charging and speaker:
Copper, Composite Epoxy Material (Low cost and single layer PCB), Polymide
Silkscreen (for fronts on the board), Photolithography Electroplating and Electroless Plating, Surface mount technology
Speaker Dock
Plastic
injection molding
Front face camera
Optical glass, plastic (for casing)
precision molding, injection molding (for casing)
Li-ion: Battery
Graphite, Lithium Cobalt Oxide, Aluminum or Stainless Steel (for casing), Polypropylene (PP)(for separator),
one fluid motion: mixing, coating, drying, stacking, winding
Touch screen
Glass
Laser cutting
Connection wires
copper
stranding, Insulation and Shielding
PCBs that contains ICs on them in the computer are used for receiving, processing, and sending the electric information from the sensors.
There are a lot of chips within: Qualcomm PM8921 Power Supply Management IC Chip EDJ4216EFBG-GNL-F Integrated circuits chip SlimPort ANX7688 is an ultra-low power 4K Ultra-HD (4096x2160p60) mobile HD transmitter designed for portable devices
Tools and techniques: Strong hands and a small screw driver
Two special Items:
Special PCB for the keyboard: What makes its special is that the one part of this PCB is made of Plastic and rubber instead of the metal and its combine the mechanical switches with the board, which results in saving of the space and the keyboard looks small and has light weight for carrying and using. And the rubber provides a very good user experience when you use keyboard as there is almost no noise.

Stabilizer for the keycaps: I think the stabilizers are fixed in a very thin and stable way under the keycaps. The intention of the designer can also be saving spaces and reduce weight.

Thanks For Watching :))))))