Research
Which is the research center of the technology, the higher level means you have more technology, 1% of all technologies' cost if you upgrade it to a higher level.

Architecture
Which represent the architecture technology level, different construction needs different architecture technology levels, 1% of all structures' cost if you upgrade it to a higher level.

Alchemy
Which represent the technology of gold mineral production, the higher level means you have higher production yield; one lever higher means 1% more production yield.

Irrigate
Which represent the technology of farming production, the higher level means you have higher production yield; one lever higher means 1% more production yield.

Excavation
Which represent the technology of stone mineral production, the higher level means you have higher production yield; one lever higher means 1% more production yield.

Lumbering
Which represent the technology of lumbering, the higher level means you have higher lumbering yield; one lever higher means 1% more lumbering yield.