Application (essential):
* Call

Abstraction:
* Lambda
* Name

Common:
* Null (=exception/undefined)
* Quot
* Qopn-Qcls
* Skip

Special:
* Namespaces (E- inputs)
* String literals (=exceptions)
* Trace/probes
* Classes (named lambda constructs)
* Methods (statically typed, optionally explicitly)
* Factories (statically typed, optionally explicitly)
* Await/after constructs with callbacks (and mutability/io quasimonads)
* Speculative execution (anychronousity and multithreading)
* Index-based linking (more static)
* Hashes (v13 extension)
* Bitstring call protocol (v13 extension)
* Evaluable to parsed