Ago 20 years Finnish Prime Minister Harri Holkeri realised first call GSM (Global System for Mobile Comunication). In this historical call it used mobile in the area of frequencies 900MHz.

This moment the GSM is person in charge for communication 1. 5 billions of persons in 212 countries of serving him 80% of world mobile telephony!

the GSM measures today oyk few first-leads. Better quality of sound, card SIM (Subscriber Identity Module), roaming, SMS and technologies GPRS and Edge are certain only from them.

the GSM was extended in the areas of frequencies 400, 800, 1800 and 1900 MHZ, while afterwards it developed in UMTS (3G), later in HSPA and HSPA+ and today in LTE (4G) network.

Two decades before therefore, began the revolution of mobile telephony and we do not have than to we are grateful for all that we enjoy today and consider data!

Source: techgear

One of the older companies in the space of photographic machines, was sold in the company Ricoh, acquaintance for her photographic machines but also for her species of office as photocopier instruments, printers and fax

On the other hand, up to now householder of Pentax, Hoya Corporation, which is specialised more in the production of optical glass shows it is not interested more for the space of digital photographic machines, selling him Pentax in Ricoh opposite $124. 2 millions!

Ricoh, specialised more in the compact photographic machines, wishes with the repurchase of Pentax it penetrates in the space of D-SLR of machines.

From October, that will close finally the agreement, the Japanese company might use in her products the name of Pentax.

Source: techgear