npm is always in lowercase

src/v2/guide/installation.md

@@ -35,9 +35,9 @@ Recommended: [https://unpkg.com/vue](https://unpkg.com/vue), which will reflect
 
 Also available on [jsDelivr](//cdn.jsdelivr.net/vue/latest/vue.js) or [cdnjs](//cdnjs.cloudflare.com/ajax/libs/vue/{{vue_version}}/vue.js), but these two services take some time to sync so the latest release may not be available yet.
 
-## NPM
+## npm
 
-NPM is the recommended installation method when building large scale applications with Vue. It pairs nicely with module bundlers such as [Webpack](https://webpack.js.org/) or [Browserify](http://browserify.org/). Vue also provides accompanying tools for authoring [Single File Components](single-file-components.html).
+npm is the recommended installation method when building large scale applications with Vue. It pairs nicely with module bundlers such as [Webpack](https://webpack.js.org/) or [Browserify](http://browserify.org/). Vue also provides accompanying tools for authoring [Single File Components](single-file-components.html).
 
 ``` bash
 # latest stable
@@ -63,7 +63,7 @@ $ npm run dev
 
 ## Explanation of Different Builds
 
-In the [`dist/` directory of the NPM package](https://unpkg.com/vue@latest/dist/) you will find many different builds of Vue.js. Here's an overview of the difference between them:
+In the [`dist/` directory of the npm package](https://unpkg.com/vue@latest/dist/) you will find many different builds of Vue.js. Here's an overview of the difference between them:
 
 | | UMD | CommonJS | ES Module |
 | --- | --- | --- | --- |

src/v2/guide/migration.md

@@ -1052,7 +1052,7 @@ text.toLowerCase()
 
 #### Replacing the `pluralize` Filter
 
-The [pluralize](https://www.npmjs.com/package/pluralize) package on NPM serves this purpose nicely, but if you only want to pluralize a specific word or want to have special output for cases like `0`, then you can also easily define your own pluralize functions. For example:
+The [pluralize](https://www.npmjs.com/package/pluralize) package on npm serves this purpose nicely, but if you only want to pluralize a specific word or want to have special output for cases like `0`, then you can also easily define your own pluralize functions. For example:
 
 ``` js
 function pluralizeKnife (count) {

src/v2/guide/single-file-components.md

@@ -54,7 +54,7 @@ Even if you don't like the idea of Single-File Components, you can still leverag
 
 With `.vue` components, we're entering the realm of advanced JavaScript applications. That means learning to use a few additional tools if you haven't already:
 
-- **Node Package Manager (NPM)**: Read the [Getting Started guide](https://docs.npmjs.com/getting-started/what-is-npm) through section _10: Uninstalling global packages_.
+- **Node Package Manager (npm)**: Read the [Getting Started guide](https://docs.npmjs.com/getting-started/what-is-npm) through section _10: Uninstalling global packages_.
 
 - **Modern JavaScript with ES2015/16**: Read through Babel's [Learn ES2015 guide](https://babeljs.io/docs/learn-es2015/). You don't have to memorize every feature right now, but keep this page as a reference you can come back to.
 

src/v2/guide/typescript.md

@@ -10,11 +10,11 @@ In Vue 2.2 we introduced dist files exposed as ES modules, which will be used by
 
 We plan to move all official declarations to use ES-style exports in the future. Please see [Recommended Configuration](#Recommended-Configuration) below on a future-proof setup.
 
-## Official Declaration in NPM Packages
+## Official Declaration in npm Packages
 
 A static type system can help prevent many potential runtime errors, especially as applications grow. That's why Vue ships with [official type declarations](https://github.com/vuejs/vue/tree/dev/types) for [TypeScript](https://www.typescriptlang.org/) - not only in Vue core, but also for [vue-router](https://github.com/vuejs/vue-router/tree/dev/types) and [vuex](https://github.com/vuejs/vuex/tree/dev/types) as well.
 
-Since these are [published on NPM](https://unpkg.com/vue/types/), and the latest TypeScript knows how to resolve type declarations in NPM packages, this means when installed via NPM, you don't need any additional tooling to use TypeScript with Vue.
+Since these are [published on npm](https://unpkg.com/vue/types/), and the latest TypeScript knows how to resolve type declarations in npm packages, this means when installed via npm, you don't need any additional tooling to use TypeScript with Vue.
 
 ## Recommended Configuration