diff --git a/src/Buffer.ts b/src/Buffer.ts
index 58cf8a8e..9a28438d 100644
--- a/src/Buffer.ts
+++ b/src/Buffer.ts
@@ -4,6 +4,7 @@
 
 import { ITerminal, IBuffer } from './Interfaces';
 import { CircularList } from './utils/CircularList';
+import { LineData, CharData } from './Types';
 
 /**
  * This class represents a terminal buffer (an internal state of the terminal), where the
@@ -13,7 +14,7 @@ import { CircularList } from './utils/CircularList';
  *   - scroll position
  */
 export class Buffer implements IBuffer {
-  private _lines: CircularList<[number, string, number][]>;
+  private _lines: CircularList<LineData>;
 
   public ydisp: number;
   public ybase: number;
@@ -39,7 +40,7 @@ export class Buffer implements IBuffer {
     this.clear();
   }
 
-  public get lines(): CircularList<[number, string, number][]> {
+  public get lines(): CircularList<LineData> {
     return this._lines;
   }
 
@@ -60,7 +61,7 @@ export class Buffer implements IBuffer {
     this.scrollBottom = 0;
     this.scrollTop = 0;
     this.tabs = {};
-    this._lines = new CircularList<[number, string, number][]>(this._terminal.options.scrollback);
+    this._lines = new CircularList<LineData>(this._terminal.options.scrollback);
     this.scrollBottom = this._terminal.rows - 1;
   }
 
@@ -72,7 +73,7 @@ export class Buffer implements IBuffer {
 
     // Deal with columns increasing (we don't do anything when columns reduce)
     if (this._terminal.cols < newCols) {
-      const ch: [number, string, number] = [this._terminal.defAttr, ' ', 1]; // does xterm use the default attr?
+      const ch: CharData = [this._terminal.defAttr, ' ', 1]; // does xterm use the default attr?
       for (let i = 0; i < this._lines.length; i++) {
         if (this._lines.get(i) === undefined) {
           this._lines.set(i, this._terminal.blankLine());
diff --git a/src/InputHandler.ts b/src/InputHandler.ts
index 2b4d01d0..91160134 100644
--- a/src/InputHandler.ts
+++ b/src/InputHandler.ts
@@ -5,6 +5,7 @@
 import { IInputHandler, ITerminal, IInputHandlingTerminal } from './Interfaces';
 import { C0 } from './EscapeSequences';
 import { DEFAULT_CHARSET } from './Charsets';
+import { CharData } from './Types';
 
 /**
  * The terminal's standard implementation of IInputHandler, this handles all
@@ -194,7 +195,7 @@ export class InputHandler implements IInputHandler {
 
     const row = this._terminal.buffer.y + this._terminal.buffer.ybase;
     let j = this._terminal.buffer.x;
-    const ch: [number, string, number] = [this._terminal.eraseAttr(), ' ', 1]; // xterm
+    const ch: CharData = [this._terminal.eraseAttr(), ' ', 1]; // xterm
 
     while (param-- && j < this._terminal.cols) {
       this._terminal.buffer.lines.get(row).splice(j++, 0, ch);
@@ -510,7 +511,7 @@ export class InputHandler implements IInputHandler {
     }
 
     const row = this._terminal.buffer.y + this._terminal.buffer.ybase;
-    const ch: [number, string, number] = [this._terminal.eraseAttr(), ' ', 1]; // xterm
+    const ch: CharData = [this._terminal.eraseAttr(), ' ', 1]; // xterm
 
     while (param--) {
       this._terminal.buffer.lines.get(row).splice(this._terminal.buffer.x, 1);
@@ -558,7 +559,7 @@ export class InputHandler implements IInputHandler {
 
     const row = this._terminal.buffer.y + this._terminal.buffer.ybase;
     let j = this._terminal.buffer.x;
-    const ch: [number, string, number] = [this._terminal.eraseAttr(), ' ', 1]; // xterm
+    const ch: CharData = [this._terminal.eraseAttr(), ' ', 1]; // xterm
 
     while (param-- && j < this._terminal.cols) {
       this._terminal.buffer.lines.get(row)[j++] = ch;
diff --git a/src/Interfaces.ts b/src/Interfaces.ts
index 506032a1..63058f09 100644
--- a/src/Interfaces.ts
+++ b/src/Interfaces.ts
@@ -3,7 +3,7 @@
  */
 
 import { ILinkMatcherOptions } from './Interfaces';
-import { LinkMatcherHandler, LinkMatcherValidationCallback, Charset } from './Types';
+import { LinkMatcherHandler, LinkMatcherValidationCallback, Charset, LineData } from './Types';
 
 export interface IBrowser {
   isNode: boolean;
@@ -46,7 +46,7 @@ export interface ITerminal extends IEventEmitter {
   log(text: string): void;
   reset(): void;
   showCursor(): void;
-  blankLine(cur?: boolean, isWrapped?: boolean): [number, string, number];
+  blankLine(cur?: boolean, isWrapped?: boolean): LineData;
 }
 
 /**
@@ -97,7 +97,7 @@ export interface IInputHandlingTerminal extends IEventEmitter {
   eraseRight(x: number, y: number): void;
   eraseLine(y: number): void;
   eraseLeft(x: number, y: number): void;
-  blankLine(cur?: boolean, isWrapped?: boolean): [number, string, number][];
+  blankLine(cur?: boolean, isWrapped?: boolean): LineData;
   prevStop(x?: number): number;
   is(term: string): boolean;
   send(data: string): void;
@@ -134,7 +134,7 @@ export interface ITerminalOptions {
 }
 
 export interface IBuffer {
-  lines: ICircularList<[number, string, number][]>;
+  lines: ICircularList<LineData>;
   ydisp: number;
   ybase: number;
   y: number;
@@ -166,7 +166,7 @@ export interface ISelectionManager {
 
   disable(): void;
   enable(): void;
-  setBuffer(buffer: ICircularList<[number, string, number][]>): void;
+  setBuffer(buffer: ICircularList<LineData>): void;
   setSelection(row: number, col: number, length: number): void;
 }
 
diff --git a/src/SelectionManager.test.ts b/src/SelectionManager.test.ts
index f640d424..a39c4dda 100644
--- a/src/SelectionManager.test.ts
+++ b/src/SelectionManager.test.ts
@@ -10,11 +10,12 @@ import { SelectionManager } from './SelectionManager';
 import { SelectionModel } from './SelectionModel';
 import { BufferSet } from './BufferSet';
 import { MockTerminal } from './utils/TestUtils';
+import { LineData } from './Types';
 
 class TestSelectionManager extends SelectionManager {
   constructor(
     terminal: ITerminal,
-    buffer: ICircularList<[number, string, number][]>,
+    buffer: ICircularList<LineData>,
     rowContainer: HTMLElement,
     charMeasure: CharMeasure
   ) {
@@ -38,7 +39,7 @@ describe('SelectionManager', () => {
   let document: Document;
 
   let terminal: ITerminal;
-  let bufferLines: ICircularList<[number, string, number][]>;
+  let bufferLines: ICircularList<LineData>;
   let rowContainer: HTMLElement;
   let selectionManager: TestSelectionManager;
 
@@ -57,8 +58,8 @@ describe('SelectionManager', () => {
     selectionManager = new TestSelectionManager(terminal, bufferLines, rowContainer, null);
   });
 
-  function stringToRow(text: string): [number, string, number][] {
-    let result: [number, string, number][] = [];
+  function stringToRow(text: string): LineData {
+    let result: LineData = [];
     for (let i = 0; i < text.length; i++) {
       result.push([0, text.charAt(i), 1]);
     }
diff --git a/src/SelectionManager.ts b/src/SelectionManager.ts
index e3770c06..781a8eda 100644
--- a/src/SelectionManager.ts
+++ b/src/SelectionManager.ts
@@ -10,6 +10,7 @@ import { EventEmitter } from './EventEmitter';
 import { ITerminal, ICircularList, ISelectionManager } from './Interfaces';
 import { SelectionModel } from './SelectionModel';
 import { translateBufferLineToString } from './utils/BufferLine';
+import { LineData } from './Types';
 
 /**
  * The number of pixels the mouse needs to be above or below the viewport in
@@ -101,7 +102,7 @@ export class SelectionManager extends EventEmitter implements ISelectionManager
 
   constructor(
     private _terminal: ITerminal,
-    private _buffer: ICircularList<[number, string, number][]>,
+    private _buffer: ICircularList<LineData>,
     private _rowContainer: HTMLElement,
     private _charMeasure: CharMeasure
   ) {
@@ -150,7 +151,7 @@ export class SelectionManager extends EventEmitter implements ISelectionManager
    * switched in or out.
    * @param buffer The active buffer.
    */
-  public setBuffer(buffer: ICircularList<[number, string, number][]>): void {
+  public setBuffer(buffer: ICircularList<LineData>): void {
     this._buffer = buffer;
     this.clearSelection();
   }
diff --git a/src/Terminal.ts b/src/Terminal.ts
index 3431df7f..360c2b7e 100644
--- a/src/Terminal.ts
+++ b/src/Terminal.ts
@@ -29,7 +29,7 @@ import * as Mouse from './utils/Mouse';
 import { CHARSETS } from './Charsets';
 import { getRawByteCoords } from './utils/Mouse';
 import { translateBufferLineToString } from './utils/BufferLine';
-import { CustomKeyEventHandler, Charset, LinkMatcherHandler, LinkMatcherValidationCallback } from './Types';
+import { CustomKeyEventHandler, Charset, LinkMatcherHandler, LinkMatcherValidationCallback, CharData, LineData } from './Types';
 import { ITerminal, IBrowser, ITerminalOptions, IInputHandlingTerminal, ILinkMatcherOptions } from './Interfaces';
 
 // Declare for RequireJS in loadAddon
@@ -2056,7 +2056,7 @@ export class Terminal extends EventEmitter implements ITerminal, IInputHandlingT
     if (!line) {
       return;
     }
-    const ch: [number, string, number] = [this.eraseAttr(), ' ', 1]; // xterm
+    const ch: CharData = [this.eraseAttr(), ' ', 1]; // xterm
     for (; x < this.cols; x++) {
       line[x] = ch;
     }
@@ -2073,7 +2073,7 @@ export class Terminal extends EventEmitter implements ITerminal, IInputHandlingT
     if (!line) {
       return;
     }
-    const ch: [number, string, number] = [this.eraseAttr(), ' ', 1]; // xterm
+    const ch: CharData = [this.eraseAttr(), ' ', 1]; // xterm
     x++;
     while (x--) {
       line[x] = ch;
@@ -2114,11 +2114,11 @@ export class Terminal extends EventEmitter implements ITerminal, IInputHandlingT
    * @param {boolean} cur First bunch of data for each "blank" character.
    * @param {boolean} isWrapped Whether the new line is wrapped from the previous line.
    */
-  public blankLine(cur?: boolean, isWrapped?: boolean): [number, string, number][] {
+  public blankLine(cur?: boolean, isWrapped?: boolean): LineData {
     const attr = cur ? this.eraseAttr() : this.defAttr;
 
-    const ch = [attr, ' ', 1]; // width defaults to 1 halfwidth character
-    const line = [];
+    const ch: CharData = [attr, ' ', 1]; // width defaults to 1 halfwidth character
+    const line: LineData = [];
 
     // TODO: It is not ideal that this is a property on an array, a buffer line
     // class should be added that will hold this data and other useful functions.
@@ -2137,7 +2137,7 @@ export class Terminal extends EventEmitter implements ITerminal, IInputHandlingT
    * If cur return the back color xterm feature attribute. Else return defAttr.
    * @param cur
    */
-  public ch(cur?: boolean): [number, string, number] {
+  public ch(cur?: boolean): CharData {
     return cur ? [this.eraseAttr(), ' ', 1] : [this.defAttr, ' ', 1];
   }
 
diff --git a/src/Types.ts b/src/Types.ts
index 34c6d94a..0753d80e 100644
--- a/src/Types.ts
+++ b/src/Types.ts
@@ -15,3 +15,6 @@ export type LinkMatcherValidationCallback = (uri: string, element: HTMLElement,
 
 export type CustomKeyEventHandler = (event: KeyboardEvent) => boolean;
 export type Charset = {[key: string]: string};
+
+export type CharData = [number, string, number];
+export type LineData = CharData[];
diff --git a/src/utils/TestUtils.ts b/src/utils/TestUtils.ts
index 9fc929fe..51caa8fe 100644
--- a/src/utils/TestUtils.ts
+++ b/src/utils/TestUtils.ts
@@ -1,4 +1,5 @@
 import { ITerminal, IBuffer, IBufferSet, IBrowser, ICharMeasure, ISelectionManager, ITerminalOptions, IListenerType } from '../Interfaces';
+import { LineData } from '../Types';
 
 export class MockTerminal implements ITerminal {
   options: ITerminalOptions = {};
@@ -47,8 +48,8 @@ export class MockTerminal implements ITerminal {
   showCursor(): void {
     throw new Error('Method not implemented.');
   }
-  blankLine(cur?: boolean, isWrapped?: boolean): [number, string, number][] {
-    const line: [number, string, number][] = [];
+  blankLine(cur?: boolean, isWrapped?: boolean): LineData {
+    const line: LineData = [];
     for (let i = 0; i < this.cols; i++) {
       line.push([0, ' ', 1]);
     }