Through the BSOL (British Standards Online) platform you will find the following techical standards:

• EN published by CEN and CENELEC, transposed by BSI
• ISO transposed by BSI
• native BSI

Through IHS Standards Expert platform  you will find the following technical standards:

• EN (Eurosource)

ATTENTION: when you access the first time you need to create a personal account (username and password)

Through ASTM Compass you will find the following techical standards:

• ASTM

ATTENTION: 

• These 3 resources can be accessed from outside the Politecnico network via proxy.
• Each file can be printed in accordance with the current regulations for the protection of copyright.

From January 2015 the UNI standards are not accessible through IHS platform.
Among the 28.000 UNI astandards active, about 22.500 are UNI EN (in english) and UNI ISO.
So, about the 80% of the UNI active standards are available as EN or ISO, and only the 6% of the standards yearly published are only UNI, without an equivalence EN or ISO.

To view the UNI stadards you can go directly to the "Ente Nazionale di Normazione", in Milano, via Sannio 2 Ph. +39 0270024.1 
http://www.uni.com/index.php