Materials and alloys.
Composite materials.
Microprocessor Technology
Transistor and digital technology.
General nano-technology and nano-technological manipulation.
Frequency handling and manipulation.
Electromagnetic controlled fields.
Diverse technologies of low non-human technology.
Velcro -Some kinds of closures.
Radar absorbent paint.
Replication Technology.
Genetic technology.
Genetic manipulation and mapping.
DVD Technology - CD.
Targeted weapons.
Energy Weapons.
Non-revolving phase radars.
Gravity Cancellation Technology.
Inertia cancellation technology.
Medical technology, medicines.
Medical technology with coordination with nano-technology applied to medicine.
MedPod Technology.
Invisibility to radar.
Not everything can be replicated, or copied, many things and many materials are so advanced that they escape the understanding of Earth science and terrestrial engineering to the extent that retro-engineering is impossible to apply.
Here's all the technology humans have reversed engineered and are from ET sources, Non human, Enjoy
