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Most reported problems
If APS.ORG works, but you cannot access the site or its individual page, try one of the possible solutions:
To delete the cache and get the current version of the page, refresh the page in the browser using the key combination Ctrl + F5.
Access to the site is blocked.
Clear your browser cookies and change the IP address of the computer.
Antivirus and firewall. Check that anti-virus programs (McAfee, Kaspersky Antivirus or an analogue) or a firewall installed on your computer do not block access to APS.ORG.
VPN and alternative DNS services.
VPN: for example, NordVPN;
Alternative DNS: OpenDNS or Google Public DNS.
For example, the AdBlock extension, along with ads, can block the content of a site. Find and disable similar plugins for your site.
Possibly, redirect from different versions is configured incorrectly on aps.org. In this case, use the links below:
http://aps.org https://aps.org http://www.aps.org https://www.aps.org