Below are definitions of certain technical terms used in this Annual Report:

"5G", is a technology under development, succeeding the mobile technology called 4G. The aim is to make the navigation experience and Internet downloads more agile.

"Access" refers to a connection to any of the telecommunications services offered by Telefónica. A single fixed customer may contract for multiple services, and Telefónica believes that it is more useful to count the number of accesses a customer has contracted for, than to merely count the number of its customers. For example, a customer that has fixed line telephony service and broadband service is counted as two accesses rather than as one customer.

“ARPU" is total service revenues divided by average number of accesses divided by the number of months.

“AWS” or Amazon Web Services refers to a service platform in the Cloud offering data base storage, content delivery and other functionalities that can help your business to grow. It is also more secure than a physical server.

“B2B” or Business to Business is the business segment.

“B2C” or Business to Customer is the residential segment.

"Bundles" refers to a combination of products that combine fixed services (wirelines, broadband and television) and mobile services.

"Churn" is the percentage of disconnections over the average customer base in a given period.

"Cloud computing" is a service, whereby shared resources, software and information are provided to computers and other devices as a utility over a network (typically, the Internet).

"Commercial activity" includes the addition of new lines, replacement of handsets, migrations and disconnections.

"Convergent" refers to the offer of more than a single service for a single price.

"Data ARPU" is data revenues divided by average number of accesses divided by the number of months.

"Data revenues" include revenues from mobile data services such as mobile connectivity and mobile Internet, premium messaging, downloading ringtones and logos, mobile mail and SMS/MMS.

"Data traffic" includes all traffic from Internet access, messaging (SMS, MMS) and connectivity services over Telefónica’s network.

"Fixed telephony accesses" includes public switched telephone network (PSTN) lines (including public use telephony), integrated services digital network (ISDN) lines and circuits, “fixed wireless” and Voice over IP accesses.

"FTRs" or "Fixed termination rates" is an established fixed network tariff that applies when a customer makes a call to someone in a network operated by another operator.

"FTTH" or "Fiber to Home" is the installation and use of optical fiber from a central point directly to individual buildings such as apartment buildings and businesses to provide high-speed Internet access.

"FTTx" is a generic term for any broadband network architecture that uses optical fiber to replace all or part of the metal local loop.

“FWA” is a fixed broad band service using Fixed Wireless technology (fixed telephony service using mobile technology).

"Gross adds" is the number of new accesses in a certain period.

"HDTV" or high definition TV has at least twice the resolution of standard definition television (SDTV), allowing it to show much more detail than an analog television or digital versatile disc (DVD).

"Interconnection revenues" means revenues received from other operators which use Telefónica's networks to connect to or finish their calls and SMS or to connect to their customers.

"Internet and data accesses" (“Fixed broadband accesses” or “FBB accesses") include broadband accesses (including retail asymmetrical digital subscriber line (ADSL), very high bitrate digital subscriber line (VDSL), satellite, fiber optic and circuits over 2 Mbps), narrowband accesses (Internet service through the PSTN lines) and the remaining non-broadband final customer circuits. Internet and data accesses also include "Naked ADSL", which allows customers to subscribe for a broadband connection without a monthly fixed line fee.

"IPTV" or Internet Protocol Television refers to distribution systems for television subscription signals or video using broadband connections over the IP protocol.

“ISDN” or Integrated Services Digital Network is a format commonly used for transmitting information through a digital high speed connection.

“ISP” is Internet Service Provider.

"Local loop" means the physical circuit connecting the network termination point at the subscriber's premises to the main distribution frame or equivalent facility in the fixed public telephone network.

"LTE" or Long-Term Evolution is a 4G mobile access technology.

"M2M", or machine to machine, refers to technologies that allow both mobile and wired systems to communicate with other devices with the same capability. "Market share" is the percentage ratio of the number of final accesses over the existing total market in an operating area.

"Mobile accesses" include accesses to the mobile network for voice and/or data services (including connectivity). Mobile accesses are categorized into contract and pre-pay accesses.

"Mobile broadband" includes Mobile Internet (Internet access from devices also used to make voice calls such as smartphones), and Mobile Connectivity (Internet access from devices that complement fixed broadband, such as PC Cards/ dongles, which enable large amounts of data to be downloaded on the move).

"MTR" or mobile termination rate is an established mobile network tariff that applies when a customer makes a call to someone in a network operated by another operator.

"MVNO" or mobile virtual network operator is a mobile operator that provides mobile services through another mobile operator. An MVNO pays a determined tariff to such mobile network operator for using the infrastructure to facilitate coverage to their customers.

"Net adds/Net loss" is the difference between the customer base in a certain period compared to a different period.

"OTT services" or over the top services means services provided through the Internet (such as television and video streaming).

"Pay TV" includes cable TV, direct to home satellite TV (DTH) and IPTV.

"p.p." means percentage points.

“PSTN” is Public Switched Telephone Network.

"Revenues" means net sales and revenues from rendering of services.

"Service revenues" are total revenues minus mobile handset sales. Service revenues are mainly related to telecommunication services, especially voice- and data revenues (SMS and data traffic download and upload revenues) consumed by Telefónica's customers.

"SIM" means subscriber identity module, a removable intelligent card used in mobile handsets, USB modems, etc. to identify the user in the network.

"UBB" or ultra-broad band is the fiber-to-the-premise broadband which is capable of giving a minimum downlink speed of 100 mbps and a minimum uplink speed of 50 mbps.

"Voice traffic" means voice minutes used by Telefónica's customers over a given period, both outbound and inbound.

"VoIP" means voice over Internet protocol.

"Wholesale accesses" means accesses Telefónica provides to other companies, who then sell services over such accesses to their residential and corporate clients.