@maruru Ok, sorry, I misunderstood your comment then.. on the "dont build it by yourself" I strongly disagree however... this philosophy is the opposite of evolution, imho; And especially when you're working on Business projects, where usually the company is not meant to adapt to the software but the software must adapt to the company needs, custom solution are often the best... but all depends on lot of variables OP didnt give ;)

Hello! Before start giving answers I need some info: how many users needs to be tracked? OS (mac, gnu/linux distro, windows)? Preferred stack (node+gulp+browserify, node+grunt+wellIthinkYouGotThePoint) I recently played with barcodes for an store app, the barcode get printed with a Dymo printer (but whatever printer can do the job), then in the shop the cashier read them with a barcode scanner (around 14$ on amazon) and place the order. With nodejs, I used this library for generating the barcode: http://lindell.me/JsBarcode/ For reading them instead, is dead simple: those barcode scanners simply read the code and send it to the PC "emulating" the keyboard: is like you typed the code by yourself, with an extra "end of line" character (usually \n but some use \r\n)

@maruru Please, explain why in 2016 still people think that "enterprise" = "stable", while dbs as PostgreSql, Mysql (with forks MariaDb/Percona) are running more than the half of database around the world.. My two cents: Mysql/MariaDB is really stable. DO NOT THINK about clustering and stuff until you need to - a full backup (codebase+db) done once or twice or N times at the begin is sufficient (on another machine, obviously)