The wordmark is the default identity used in most internal applications and is always used when vertical space is limited.
Examples: the header or main navigation of a website, letterhead, email, press releases, horizontal advertisements, etc.
The horizontal version is used for external applications where vertical space is limited.
Examples: The sponsor page of a conference or coalition, the back of a conference t-shirt, tradeshow booth graphics, business cards and collateral.
The mark is used for internal branding and collateral and situations where the full wordmark is used nearby.
Examples: Having the wordmark in the header and the mark in the footer of a website, or different panels of a trade-show booth.
The vertical version is used rarely for square or grid placements when NodeSource appears alongside other company logos as well as on swag or collateral.
Examples: The sponsor page of a conference or coalition, the back of a conference t-shirt.