Instant WebKiosk is a free and refined “live” (no installation required)
browser-only (only the browser interface will show up) operating system based
on Linux Debian and designed for use in web kiosks, multi-user “web
workstations” (cafès, offices, schools, hotels) and digital signage
deployments.

It makes use of Google Chromium as Internet browser and it features audio
support, video files support, Adobe Flash support, PDF and images viewing,
office files and compressed files support; it features full “i18n”
(internationalization) including CJ input methods and a very useful on-screen
virtual keyboard for touch devices.

Instant WebKiosk protects your privacy even if it's fully customizable: users
can change its settings (or install “apps” from the Chrome Web Store) but,
thanks to its “live” nature and design, after a reset the operating system
presents itself with the default settings and users' private informations are
completely destroyed.

Instant WebKiosk boots form USB flash devices (in order to write the
downloaded IWK ISO file to a USB stick, Windows users can use Win32DiskImager,
while Linux users can make use of dd) and supports the same hardware that
default Debian Linux distributions do – no less… no more.

Supported file types in detail: Instant WebKiosk can read txt, html, xml, gif,
jpeg, png, psd, mpeg, mp3, mp4, avi, wmv, wma, asf, mov, 3gp, ogg, ogm, mkv,
rm, wav, dts, aac, flc, flv, midi, pdf, csv, doc, xls, ppt, rtf, odt, ods,
odp, and zip files. All known unsupported file types are filtered.

…and there's more: Instant WebKiosk for Raspberry Pi is an IWK-derived
operating system for the well known Raspberry Pi micro-computer!