5. Computing. Originally: a server or website that provides Internet access. Later also: a website or service that provides access to a number of sources of information and facilities, such as a directory of links to other websites, search engines, email, online shopping, etc. More fully portal site.

1990   Re: DECnet Encapsulation in TCP-IP in comp.protocols.tcp-ip (Usenet newsgroup) 20 Nov.   DEC used to have a product called an ‘internet portal’ which enveloped TCP/IP within DECnet.
1993   Cu Digest (Electronic text) 5 No. 73   ‘Michael and Steven will sift the wheat from the chaff every week.’.. dogshit's Internet portals, said Eisner, are: dshit@hollywood.edu; and dshit@bevhills.gov.
1997   New Media Age (Nexis) 17 July 2   The changes will see MSN (UK) investing more time, money and effort in its portal site www.uk.msn.com.
1998   Guardian 23 July (Online Suppl.) 2/5   As more traffic is filtered through fewer of these catch-all supersites, the easier it becomes for portals to control the Web experience, collecting important data on surfers, like their viewing and buying habits, and personal interests.
2001   Contact May 13/1   The image can either be sent as an email, added to a picture album on Ericsson's mobile internet portal, or stored in the camera.