diff --git a/src/util/types.ts b/src/util/types.ts
index cccbce0..05946fc 100644
--- a/src/util/types.ts
+++ b/src/util/types.ts
@@ -3,6 +3,8 @@ export type Awaitable<T> = T | Promise<T>
 export type JSONScalar = string | boolean | number | undefined
 export type JSONData = JSONScalar | Array<JSONScalar | JSONData> | { [key: string]: JSONScalar | JSONData }
 
+export type ElementType<T extends readonly any[]> = T extends (infer U)[] ? U : never;
+
 /** A typescript-compatible version of Object.hasOwnProperty. */
 export function hasOwnProperty<X extends {}, Y extends PropertyKey>(obj: X, prop: Y): obj is X & Record<Y, unknown> {  // eslint-disable-line @typescript-eslint/ban-types
     return Object.hasOwnProperty.call(obj, prop)
diff --git a/src/vm/commands/clear.ts b/src/vm/commands/clear.ts
new file mode 100644
index 0000000..7249078
--- /dev/null
+++ b/src/vm/commands/clear.ts
@@ -0,0 +1,16 @@
+import {Command, ParseContext} from "./command.js";
+import {LexInput} from "../lexer.js";
+
+export class Clear extends Command<{}> {
+    isParseCandidate(token: LexInput): boolean {
+        return this.isKeyword(token, 'clear')
+    }
+
+    attemptParse(context: ParseContext): {} {
+        return {}
+    }
+
+    getDisplayName(): string {
+        return 'clear'
+    }
+}
diff --git a/src/vm/commands/command.ts b/src/vm/commands/command.ts
index 91ce675..6855e19 100644
--- a/src/vm/commands/command.ts
+++ b/src/vm/commands/command.ts
@@ -5,6 +5,7 @@ import {
     IsNotKeywordError,
     UnexpectedEndOfInputError
 } from "../parse.js";
+import {ElementType} from "../../util/types.js";
 
 export type StrLVal = { term: 'variable', name: string }
 
@@ -48,7 +49,12 @@ export class ParseContext {
         return { term: 'string', value: input.value, literal: input.literal }
     }
 
-    popKeywordInSet<T extends string[]>(options: T) {
+    popOptionalKeywordInSet<const T extends readonly string[]>(options: T): (StrTerm & { value: ElementType<T> }) | undefined {
+        if ( this.inputs.length ) return this.popKeywordInSet(options)
+        return undefined
+    }
+
+    popKeywordInSet<const T extends readonly string[]>(options: T): StrTerm & { value: ElementType<T> } {
         if ( !this.inputs.length ) {
             throw new UnexpectedEndOfInputError('Unexpected end of input. Expected one of: ' + options.join(', '))
         }
@@ -58,6 +64,8 @@ export class ParseContext {
         if ( input.literal || !options.includes(input.value) ) {
             throw new IsNotKeywordError('Unexpected term: ' + input.value + ' (expected one of: ' + options.join(', ') + ')')
         }
+
+        return { term: 'string', value: input.value as ElementType<T> }
     }
 
     popLVal(): StrLVal {
diff --git a/src/vm/commands/contains.ts b/src/vm/commands/contains.ts
new file mode 100644
index 0000000..f89b7ee
--- /dev/null
+++ b/src/vm/commands/contains.ts
@@ -0,0 +1,18 @@
+import { LexInput } from "../lexer.js";
+import {Command, ParseContext, StrTerm} from "./command.js";
+
+export class Contains extends Command<{ find: StrTerm }> {
+    attemptParse(context: ParseContext): { find: StrTerm } {
+        return {
+            find: context.popTerm(),
+        }
+    }
+
+    getDisplayName(): string {
+        return 'contains'
+    }
+
+    isParseCandidate(token: LexInput): boolean {
+        return this.isKeyword(token, 'contains')
+    }
+}
diff --git a/src/vm/commands/enclose.ts b/src/vm/commands/enclose.ts
new file mode 100644
index 0000000..7dbfec6
--- /dev/null
+++ b/src/vm/commands/enclose.ts
@@ -0,0 +1,24 @@
+import {Command, ParseContext, StrTerm} from "./command.js";
+import {LexInput} from "../lexer.js";
+
+export type EncloseData = {
+    left?: StrTerm,
+    right?: StrTerm,
+}
+
+export class Enclose extends Command<EncloseData> {
+    attemptParse(context: ParseContext): EncloseData {
+        return {
+            left: context.popOptionalTerm(),
+            right: context.popOptionalTerm(),
+        }
+    }
+
+    getDisplayName(): string {
+        return 'enclose'
+    }
+
+    isParseCandidate(token: LexInput): boolean {
+        return this.isKeyword(token, 'enclose')
+    }
+}
diff --git a/src/vm/commands/help.ts b/src/vm/commands/help.ts
new file mode 100644
index 0000000..7865d39
--- /dev/null
+++ b/src/vm/commands/help.ts
@@ -0,0 +1,16 @@
+import {Command, ParseContext} from "./command.js";
+import {LexInput} from "../lexer.js";
+
+export class Help extends Command<{}> {
+    isParseCandidate(token: LexInput): boolean {
+        return this.isKeyword(token, 'help')
+    }
+
+    attemptParse(context: ParseContext): {} {
+        return {}
+    }
+
+    getDisplayName(): string {
+        return 'help'
+    }
+}
diff --git a/src/vm/commands/indent.ts b/src/vm/commands/indent.ts
new file mode 100644
index 0000000..6d59413
--- /dev/null
+++ b/src/vm/commands/indent.ts
@@ -0,0 +1,24 @@
+import {Command, ParseContext, StrTerm} from "./command.js";
+import {LexInput} from "../lexer.js";
+
+export type IndentData = {
+    type: 'space'|'tab',
+    level?: StrTerm,
+}
+
+export class Indent extends Command<IndentData> {
+    attemptParse(context: ParseContext): IndentData {
+        return {
+            type: context.popKeywordInSet(['space', 'tab']).value,
+            level: context.popOptionalTerm(),
+        }
+    }
+
+    isParseCandidate(token: LexInput): boolean {
+        return this.isKeyword(token, 'indent')
+    }
+
+    getDisplayName(): string {
+        return 'indent'
+    }
+}
diff --git a/src/vm/commands/index.ts b/src/vm/commands/index.ts
index a93d0b5..fb22e4e 100644
--- a/src/vm/commands/index.ts
+++ b/src/vm/commands/index.ts
@@ -11,19 +11,67 @@ import {Paste} from "./paste.js";
 import {RunFile} from "./runfile.js";
 import {Save} from "./save.js";
 import {To} from "./to.js";
+import {Lipsum} from "./lipsum.js";
+import {Indent} from "./indent.js";
+import {Clear} from "./clear.js";
+import {Contains} from "./contains.js";
+import {Enclose} from "./enclose.js";
+import {Help} from "./help.js";
+import {Join} from "./join.js";
+import {Lines} from "./lines.js";
+import {Lower} from "./lower.js";
+import {LSub} from "./lsub.js";
+import {Missing} from "./missing.js";
+import {Prefix} from "./prefix.js";
+import {Quote} from "./quote.js";
+import {Redo} from "./redo.js";
+import {Replace} from "./replace.js";
+import {RSub} from "./rsub.js";
+import {Show} from "./show.js";
+import {Split} from "./split.js";
+import {Suffix} from "./suffix.js";
+import {Trim} from "./trim.js";
+import {Undo} from "./undo.js";
+import {Unique} from "./unique.js";
+import {Unquote} from "./unquote.js";
+import {Upper} from "./upper.js";
 
 export type Commands = Command<CommandData>[]
 export const commands: Commands = [
+    new Clear,
+    new Contains,
     new Copy,
     new Edit,
+    new Enclose,
     new Exit,
     new From,
+    new Help,
     new History,
+    new Indent,
     new InFile,
+    new Join,
+    new Lines,
+    new Lipsum,
     new Load,
+    new Lower,
+    new LSub,
+    new Missing,
     new OutFile,
     new Paste,
+    new Prefix,
+    new Quote,
+    new Redo,
+    new Replace,
+    new RSub,
     new RunFile,
     new Save,
+    new Show,
+    new Split,
+    new Suffix,
     new To,
+    new Trim,
+    new Undo,
+    new Unique,
+    new Unquote,
+    new Upper,
 ]
diff --git a/src/vm/commands/join.ts b/src/vm/commands/join.ts
new file mode 100644
index 0000000..01ece67
--- /dev/null
+++ b/src/vm/commands/join.ts
@@ -0,0 +1,18 @@
+import {Command, ParseContext, StrTerm} from "./command.js";
+import {LexInput} from "../lexer.js";
+
+export class Join extends Command<{ with: StrTerm }> {
+    attemptParse(context: ParseContext): { with: StrTerm } {
+        return {
+            with: context.popTerm(),
+        }
+    }
+
+    getDisplayName(): string {
+        return 'join'
+    }
+
+    isParseCandidate(token: LexInput): boolean {
+        return this.isKeyword(token, 'join')
+    }
+}
diff --git a/src/vm/commands/lines.ts b/src/vm/commands/lines.ts
new file mode 100644
index 0000000..19e5880
--- /dev/null
+++ b/src/vm/commands/lines.ts
@@ -0,0 +1,24 @@
+import {Command, ParseContext, StrTerm} from "./command.js";
+import {LexInput} from "../lexer.js";
+
+export type LinesData = {
+    on?: StrTerm,
+    with?: StrTerm,
+}
+
+export class Lines extends Command<LinesData> {
+    attemptParse(context: ParseContext): LinesData {
+        return {
+            on: context.popOptionalTerm(),
+            with: context.popOptionalTerm(),
+        }
+    }
+
+    getDisplayName(): string {
+        return 'lines'
+    }
+
+    isParseCandidate(token: LexInput): boolean {
+        return this.isKeyword(token, 'lines')
+    }
+}
diff --git a/src/vm/commands/lipsum.ts b/src/vm/commands/lipsum.ts
index ec0456b..8f4253a 100644
--- a/src/vm/commands/lipsum.ts
+++ b/src/vm/commands/lipsum.ts
@@ -1,10 +1,13 @@
 import {Command, ParseContext, StrTerm} from './command.js'
 import {LexInput} from '../lexer.js'
 
-export class Lipsum extends Command<{ length: StrTerm }> {
-    attemptParse(context: ParseContext): { length: StrTerm } {
+export type LipsumData = { length: StrTerm, type: 'word'|'line'|'para' }
+
+export class Lipsum extends Command<LipsumData> {
+    attemptParse(context: ParseContext): LipsumData {
         return {
             length: context.popTerm(),
+            type: context.popKeywordInSet(['word', 'line', 'para']).value,
         }
     }
 
diff --git a/src/vm/commands/lower.ts b/src/vm/commands/lower.ts
new file mode 100644
index 0000000..5d79b4f
--- /dev/null
+++ b/src/vm/commands/lower.ts
@@ -0,0 +1,16 @@
+import {Command, ParseContext} from "./command.js";
+import {LexInput} from "../lexer.js";
+
+export class Lower extends Command<{}> {
+    isParseCandidate(token: LexInput): boolean {
+        return this.isKeyword(token, 'lower')
+    }
+
+    attemptParse(context: ParseContext): {} {
+        return {}
+    }
+
+    getDisplayName(): string {
+        return 'lower'
+    }
+}
diff --git a/src/vm/commands/lsub.ts b/src/vm/commands/lsub.ts
new file mode 100644
index 0000000..43e1f84
--- /dev/null
+++ b/src/vm/commands/lsub.ts
@@ -0,0 +1,24 @@
+import {Command, ParseContext, StrTerm} from "./command.js";
+import {LexInput} from "../lexer.js";
+
+export type LSubData = {
+    offset: StrTerm,
+    length?: StrTerm,
+}
+
+export class LSub extends Command<LSubData> {
+    attemptParse(context: ParseContext): LSubData {
+        return {
+            offset: context.popTerm(),
+            length: context.popOptionalTerm(),
+        }
+    }
+
+    getDisplayName(): string {
+        return 'lsub'
+    }
+
+    isParseCandidate(token: LexInput): boolean {
+        return this.isKeyword(token, 'lsub')
+    }
+}
diff --git a/src/vm/commands/missing.ts b/src/vm/commands/missing.ts
new file mode 100644
index 0000000..7d6afa9
--- /dev/null
+++ b/src/vm/commands/missing.ts
@@ -0,0 +1,18 @@
+import { LexInput } from "../lexer.js";
+import {Command, ParseContext, StrTerm} from "./command.js";
+
+export class Missing extends Command<{ find: StrTerm }> {
+    attemptParse(context: ParseContext): { find: StrTerm } {
+        return {
+            find: context.popTerm(),
+        }
+    }
+
+    getDisplayName(): string {
+        return 'missing'
+    }
+
+    isParseCandidate(token: LexInput): boolean {
+        return this.isKeyword(token, 'missing')
+    }
+}
diff --git a/src/vm/commands/prefix.ts b/src/vm/commands/prefix.ts
new file mode 100644
index 0000000..71fc078
--- /dev/null
+++ b/src/vm/commands/prefix.ts
@@ -0,0 +1,18 @@
+import {Command, ParseContext, StrTerm} from "./command.js";
+import {LexInput} from "../lexer.js";
+
+export class Prefix extends Command<{ with: StrTerm }> {
+    attemptParse(context: ParseContext): { with: StrTerm } {
+        return {
+            with: context.popTerm(),
+        }
+    }
+
+    getDisplayName(): string {
+        return 'prefix'
+    }
+
+    isParseCandidate(token: LexInput): boolean {
+        return this.isKeyword(token, 'prefix')
+    }
+}
diff --git a/src/vm/commands/quote.ts b/src/vm/commands/quote.ts
new file mode 100644
index 0000000..dbf0006
--- /dev/null
+++ b/src/vm/commands/quote.ts
@@ -0,0 +1,18 @@
+import {Command, ParseContext, StrTerm} from "./command.js";
+import {LexInput} from "../lexer.js";
+
+export class Quote extends Command<{ with?: StrTerm }> {
+    attemptParse(context: ParseContext): { with?: StrTerm } {
+        return {
+            with: context.popOptionalTerm(),
+        }
+    }
+
+    getDisplayName(): string {
+        return 'quote'
+    }
+
+    isParseCandidate(token: LexInput): boolean {
+        return this.isKeyword(token, 'quote')
+    }
+}
diff --git a/src/vm/commands/redo.ts b/src/vm/commands/redo.ts
new file mode 100644
index 0000000..805d74d
--- /dev/null
+++ b/src/vm/commands/redo.ts
@@ -0,0 +1,18 @@
+import {Command, ParseContext, StrTerm} from "./command.js";
+import {LexInput} from "../lexer.js";
+
+export class Redo extends Command<{ steps: StrTerm }> {
+    isParseCandidate(token: LexInput): boolean {
+        return this.isKeyword(token, 'redo')
+    }
+
+    attemptParse(context: ParseContext): { steps: StrTerm } {
+        return {
+            steps: context.popTerm(),
+        }
+    }
+
+    getDisplayName(): string {
+        return 'redo'
+    }
+}
diff --git a/src/vm/commands/replace.ts b/src/vm/commands/replace.ts
new file mode 100644
index 0000000..bcbca96
--- /dev/null
+++ b/src/vm/commands/replace.ts
@@ -0,0 +1,24 @@
+import {Command, ParseContext, StrTerm} from "./command.js";
+import {LexInput} from "../lexer.js";
+
+export type ReplaceData = {
+    find: StrTerm,
+    with: StrTerm,
+}
+
+export class Replace extends Command<ReplaceData> {
+    attemptParse(context: ParseContext): ReplaceData {
+        return {
+            find: context.popTerm(),
+            with: context.popTerm(),
+        }
+    }
+
+    getDisplayName(): string {
+        return 'replace'
+    }
+
+    isParseCandidate(token: LexInput): boolean {
+        return this.isKeyword(token, 'replace')
+    }
+}
diff --git a/src/vm/commands/rsub.ts b/src/vm/commands/rsub.ts
new file mode 100644
index 0000000..3ae388b
--- /dev/null
+++ b/src/vm/commands/rsub.ts
@@ -0,0 +1,24 @@
+import {Command, ParseContext, StrTerm} from "./command.js";
+import {LexInput} from "../lexer.js";
+
+export type RSubData = {
+    offset: StrTerm,
+    length?: StrTerm,
+}
+
+export class RSub extends Command<RSubData> {
+    attemptParse(context: ParseContext): RSubData {
+        return {
+            offset: context.popTerm(),
+            length: context.popOptionalTerm(),
+        }
+    }
+
+    getDisplayName(): string {
+        return 'rsub'
+    }
+
+    isParseCandidate(token: LexInput): boolean {
+        return this.isKeyword(token, 'rsub')
+    }
+}
diff --git a/src/vm/commands/show.ts b/src/vm/commands/show.ts
new file mode 100644
index 0000000..3ed88c4
--- /dev/null
+++ b/src/vm/commands/show.ts
@@ -0,0 +1,16 @@
+import {Command, ParseContext} from "./command.js";
+import {LexInput} from "../lexer.js";
+
+export class Show extends Command<{}> {
+    isParseCandidate(token: LexInput): boolean {
+        return this.isKeyword(token, 'show')
+    }
+
+    attemptParse(context: ParseContext): {} {
+        return {}
+    }
+
+    getDisplayName(): string {
+        return 'show'
+    }
+}
diff --git a/src/vm/commands/split.ts b/src/vm/commands/split.ts
new file mode 100644
index 0000000..86ce27d
--- /dev/null
+++ b/src/vm/commands/split.ts
@@ -0,0 +1,24 @@
+import {Command, ParseContext, StrTerm} from "./command.js";
+import {LexInput} from "../lexer.js";
+
+export type SplitData = {
+    on: StrTerm,
+    with?: StrTerm,
+}
+
+export class Split extends Command<SplitData> {
+    attemptParse(context: ParseContext): SplitData {
+        return {
+            on: context.popTerm(),
+            with: context.popOptionalTerm(),
+        }
+    }
+
+    getDisplayName(): string {
+        return 'split'
+    }
+
+    isParseCandidate(token: LexInput): boolean {
+        return this.isKeyword(token, 'split')
+    }
+}
diff --git a/src/vm/commands/suffix.ts b/src/vm/commands/suffix.ts
new file mode 100644
index 0000000..fea854d
--- /dev/null
+++ b/src/vm/commands/suffix.ts
@@ -0,0 +1,18 @@
+import {Command, ParseContext, StrTerm} from "./command.js";
+import {LexInput} from "../lexer.js";
+
+export class Suffix extends Command<{ with: StrTerm }> {
+    attemptParse(context: ParseContext): { with: StrTerm } {
+        return {
+            with: context.popTerm(),
+        }
+    }
+
+    getDisplayName(): string {
+        return 'suffix'
+    }
+
+    isParseCandidate(token: LexInput): boolean {
+        return this.isKeyword(token, 'suffix')
+    }
+}
diff --git a/src/vm/commands/trim.ts b/src/vm/commands/trim.ts
new file mode 100644
index 0000000..af77c9f
--- /dev/null
+++ b/src/vm/commands/trim.ts
@@ -0,0 +1,24 @@
+import {Command, ParseContext, StrTerm} from "./command.js";
+import {LexInput} from "../lexer.js";
+
+export type TrimData = {
+    type?: 'start'|'end'|'both'|'left'|'right'|'lines',
+    char?: StrTerm,
+}
+
+export class Trim extends Command<TrimData> {
+    attemptParse(context: ParseContext): TrimData {
+        return {
+            type: context.popOptionalKeywordInSet(['start', 'end', 'both', 'left', 'right', 'lines'])?.value,
+            char: context.popOptionalTerm(),
+        }
+    }
+
+    getDisplayName(): string {
+        return 'trim'
+    }
+
+    isParseCandidate(token: LexInput): boolean {
+        return this.isKeyword(token, 'trim')
+    }
+}
diff --git a/src/vm/commands/undo.ts b/src/vm/commands/undo.ts
new file mode 100644
index 0000000..ab9b5c2
--- /dev/null
+++ b/src/vm/commands/undo.ts
@@ -0,0 +1,18 @@
+import {Command, ParseContext, StrTerm} from "./command.js";
+import {LexInput} from "../lexer.js";
+
+export class Undo extends Command<{ steps: StrTerm }> {
+    isParseCandidate(token: LexInput): boolean {
+        return this.isKeyword(token, 'undo')
+    }
+
+    attemptParse(context: ParseContext): { steps: StrTerm } {
+        return {
+            steps: context.popTerm(),
+        }
+    }
+
+    getDisplayName(): string {
+        return 'undo'
+    }
+}
diff --git a/src/vm/commands/unique.ts b/src/vm/commands/unique.ts
new file mode 100644
index 0000000..0c31233
--- /dev/null
+++ b/src/vm/commands/unique.ts
@@ -0,0 +1,16 @@
+import {Command, ParseContext} from "./command.js";
+import {LexInput} from "../lexer.js";
+
+export class Unique extends Command<{}> {
+    isParseCandidate(token: LexInput): boolean {
+        return this.isKeyword(token, 'unique')
+    }
+
+    attemptParse(context: ParseContext): {} {
+        return {}
+    }
+
+    getDisplayName(): string {
+        return 'unique'
+    }
+}
diff --git a/src/vm/commands/unquote.ts b/src/vm/commands/unquote.ts
new file mode 100644
index 0000000..9b65001
--- /dev/null
+++ b/src/vm/commands/unquote.ts
@@ -0,0 +1,18 @@
+import {Command, ParseContext, StrTerm} from "./command.js";
+import {LexInput} from "../lexer.js";
+
+export class Unquote extends Command<{ with?: StrTerm }> {
+    attemptParse(context: ParseContext): { with?: StrTerm } {
+        return {
+            with: context.popOptionalTerm(),
+        }
+    }
+
+    getDisplayName(): string {
+        return 'unquote'
+    }
+
+    isParseCandidate(token: LexInput): boolean {
+        return this.isKeyword(token, 'unquote')
+    }
+}
diff --git a/src/vm/commands/upper.ts b/src/vm/commands/upper.ts
new file mode 100644
index 0000000..ac0fd6e
--- /dev/null
+++ b/src/vm/commands/upper.ts
@@ -0,0 +1,16 @@
+import {Command, ParseContext} from "./command.js";
+import {LexInput} from "../lexer.js";
+
+export class Upper extends Command<{}> {
+    isParseCandidate(token: LexInput): boolean {
+        return this.isKeyword(token, 'upper')
+    }
+
+    attemptParse(context: ParseContext): {} {
+        return {}
+    }
+
+    getDisplayName(): string {
+        return 'upper'
+    }
+}