Larry Boyd said: @Doug: I basically agree with your suggested order for the language portion of the manual. Why don't you post it in a new thread? Okay. Here's a reorganized table of contents for the language manual. 1. General functional/declarative programming scripts, statements, expressions statements: assign, if for ; {} expressions: let() ?: operator precedence function/module calls, positional and named arguments data types: undef, bool, number, string, list, range 3 namespaces: variables, functions, modules, scoping rules, lexical scoping, special variables 2. Constructing 3D Objects cube(), sphere(), cylinder(), polyhedron(), linear_extrude(), rotate_extrude() import stl and off, surface() 3. Constructing 2D Objects square(), circle(), polygon(), projection(), text(), import dxf 4. Geometric Operations 4.1 Affine Transformations: scale, rotate, translate, mirror, multmatrix 4.2 Set Operations: union, intersection, difference, intersection_for 4.3 Other: resize, offset, minkowski, hull 5. Booleans true, false, &&, ||, ! if, ?: 6. Numbers numeric literals, NaN, Inf +, -, *, /, %, trig: PI,cos,sin,tan,acos,asin,atan,atan2, transcendental: exp,ln,log,pow,sqrt, abs,ceil,floor,max,min,rands,round,sign 7. Strings string literals x[i], len(),str(),chr() 8. Lists and Ranges syntax: list literals, list comprehensions, ranges x[i], concat(),len(),search(), for() 9. Linear Algebra (Vectors and Matrices) cross(),norm(), + - * / on vectors and matrices 10. Function and Module Definitions function, module, children() 11. External Library Scripts use<>, include<>, variable override behaviour 12. Other Preview: color(), render(), convexity arguments Animation: $t, $vpr, $vpt, $vpd Modifiers: % # ! * echo(), version(), version_num(), parent_module(), $parent_modules This isn't a strict reference manual, with an alphabetical list of primitives, each defined in exactly one place. It's organized by topic, and sometimes the same primitive needs to be discussed under several topics. Eg, + is specified in General/operator precedence, Numbers, and Linear Algebra, while len() is specified in String and List. There will be See Also links to other sections where appropriate.