Question: In what country was "Glendora" released by a company whose name was also used for television and radio sets?

Context paragraphs:
Radio Rentals: Radio Rentals was formed in 1930 in Brighton, Sussex, UK to rent out radio sets by Percy Perring-Thoms with a turnover in the first year of £780.  It later moved into televisions and ultimately video recorders.  In 1964 (reference: Radio Rentals Staff Handbook) it merged with RentaSet, Joseph Robinson's similarly formed company.  Then in 1968 it was acquired by Thorn Electrical Industries and joined with Thorn's DER chain (founded 1938) as part of Thorn Television Rentals (TTR) though the two companies were run completely separately with different staff and vehicles etc.  In 1980 TTR and thus Radio Rentals became part of the merged Thorn-EMI, and in 2000 it merged with Granada Limited to form boxclever.  The company still trades as Radio Rentals in Australia.

Cohmad Securities: Cohmad Securities was a US company whose main business was to introduce investors to the Bernard Madoff investment company for which it received commission based on the amount invested.  The company, whose name combines “Cohn” and “Madoff,” was founded in 1985 by Bernard Madoff and Maurice Cohn, Madoff’s friend and former neighbor.  Its office was located at the same address as Madoff's firm, and it employed between 10 and 20 employees with annual sales between $1M and $5M.

All American Five: The term All American Five is a colloquial name for mass-produced, superheterodyne radio receivers that used five vacuum tubes in their design.  These radio sets were designed to receive amplitude modulation (AM) broadcasts in the medium wave band, and were manufactured in the United States from the mid-1930s until the early 1960s.  By eliminating a power transformer, cost of the units was kept low; the same principle was later applied to television receivers.  Variations in the design for lower cost, shortwave bands, better performance or special power supplies existed, although many sets used an identical set of vacuum tubes.

Neutrodyne: The Neutrodyne radio receiver, invented in 1922 by Louis Hazeltine, was a particular type of tuned radio frequency (TRF) receiver, in which the instability-causing inter-electrode capacitance of the triode RF tubes is cancelled out or "neutralized".  to prevent parasitic oscillations which caused "squealing" or "howling" noises in the speakers of early radio sets.  In most designs, a small extra winding on each of the RF amplifiers' tuned anode coils was used to generate a small antiphase signal, which could be adjusted by special variable trim capacitors to cancel out the stray signal coupled to the grid via plate-to-grid capacitance.  The Neutrodyne circuit was popular in radio receivers until the 1930s, when it was superseded by the superheterodyne receiver.

Glendora (song): "Glendora" is a popular song written by Ray Stanley and published in 1956.  It was recorded on May 8, 1956 by Perry Como.  It was released by RCA Victor in the United States (catalog number 20-6554 on 78rpm, 47-6554 on 45rpm) and by RCA in France (catalog number 45-326); it was released in the United Kingdom]by HMV (catalog number POP-240).

HMV: HMV Retail Ltd. is an entertainment retailing company (registered in England) operating in the United Kingdom.  The first HMV-branded store was opened by the Gramophone Company on Oxford Street in 1921, and the HMV name was also used for television and radio sets manufactured from the 1930s onwards.  The retail side of the business began to expand in the 1960s, and in 1998 was divested from EMI, the successor to the Gramophone Company, to form what would become HMV Group.

EI Niš: Ei Niš, short for Electronic Industry Niš (Elektronska industrija Niš) is a company with headquarters in Niš, Serbia.  It originated in 1948 from the foundation of the Institute for the Production of Radio Sets and Roentgen Machines, "RR Niš."  In 1970-s and 1980-s it was one of the greatest Yugoslavian companies employing over 10 thousand people.  However, during the 1990-s most of the company business collapsed, due to lack of investing in research and sanctions the country was facing.

Lafayette Radio Electronics: Lafayette Radio Electronics Corporation was a radio manufacturer and retailer based in Syosset, New York.  The company sold radio sets, amateur radio equipment, citizen's band (CB) radios, other communications equipment, electronic components and tools through retail outlets and by mail-order.

Fitted For Wireless: Fitted For Wireless (FFW) and Fitted For Radio (FFR) were British Army designators for vehicles equipped to carry radio equipment.  Although many of these vehicles would be dedicated 'radio vans' and would have the complex and expensive radio sets installed, the intention was also that general purpose vehicles could be issued in 'FFW' state with the low-cost but time-consuming cabling and equipment mounts already prepared.  The actual sets themselves could be installed later, if a new radio vehicle was required owing to damage or breakdown.

Gagliano Neto: Leonardo Gagliano Neto was a Brazilian radio announcer and sports commentator.  In 1938 he made history in Brazilian communications, at that year's Football World Cup in France as Brazil's Radio Club sports commentator.  Through radio sets as well as loudspeakers installed in parks and public thoroughfares throughout the country, he thrilled the Brazilian population with their first nationwide transatlantic live radio broadcast.

Supporting paragraphs: Glendora (song) HMV
Answer: United Kingdom