Minuscule waists - and VERY short skirts: Secretaries from the Thirties to the Swinging Sixties reveal how office girls looked in decades past (obligitory cigarette and all) By Sadie Whitelocks PUBLISHED: 20:36 GMT, 6 September 2012 | UPDATED: 12:48 GMT, 7 September 2012 A series of photographs capturing secretaries at work from the Thirties through to the Swinging Sixties demonstrate some of the daring styles that were in vogue decades ago. From miniskirts to kitten heels, the young corporate helpmates model a range of liberating office wear while heavy eye-make up and rouged lips complete the sexually empowered style as demonstrated by characters such as Joan Holloway in the hit AMC series Mad Men. But it's not just the dress code that has changed over the years, and the action shots showcase a range of practices that would be frowned upon in the workplace today, such as smoking, drinking and outright flirting. The changing shape of women: With conical bra and cinched in waist, this Sixties secretary shows just how much women's silhouettes - and fashions - have changed over the decades Perks of the job: It's not hard to see where Mad Men costume designer Janie Bryant looked to source inspiration for Joan Holloway's costumes on the show Appropriate attire? A teenage girl gets to grips with the office equipment in a tiny skirt and white go-go boots Can I help? Telephones became increasingly commonplace during the Twenties and Thirties - in 1929 President Herbert Hoover had a phone installed at his desk in the White House Health hazard: For decades smoking at work was commonplace, however in 1998 a number of countries enforced a ban preventing the practice While the men photographed appear to be in their mid-to late thirties all of the women are considerably younger, as it was traditional for women to quit their jobs once married and with children. Washington correspondent Eleanor Clift who worked as a Newsweek secretary during the Sixties told The Daily Beast: 'Women weren't supposed to be openly ambitious in the '60s.  'When I started at Newsweek As a secretary, I was thrilled to be where what I typed was interesting. I was the daughter of immigrants, my father had a deli, and my mother made the potato salad and rice pudding.' The thigh's the limit! A blonde-haired woman stands by a filing cabinet in a scarlet mini dress Under pressure: One woman calmly listens to a caller while another lets the stress get to her On call: A secretary exposes some thigh as she mans the phone at an advertising agency in Soho, London One of the archive shots shows a young lady perched on the edge of her desk taking a telephone call with a short dress revealing ample thigh, while another woman sits typing unaware that her stockings are on display. Other images capture boss / secretary relationships - often a source of office gossip. In the Mad Men series Joan had a brief affair with her boss Roger Sterling while in the fifth season advertising executive Don Draper married his secretary, Megan. Ms Clift admits she was also guilty of indulging in an office romance, stating that at the time she 'was living with a television director I had met at a previous job working as a secretary at ad agency Albert Frank-Guenther Law.' One archive shot shows a 51-year-old Albert Einstein in his attic flat in Berlin, siting a good distance away from his conservatively dressed secretary while dictating a scientific paper. To close for comfort? A businessman gives his secretary a lingering glance before leaving the office Ready for action: Women did all sorts of jobs during the 1960s, but some of the most common jobs were teacher, nurse, secretary, typist, bookkeeper and shop assistant  Well seated: Two female assistants get comfortable on some retro-style furniture Gadget proud: A secretary admires a new three-inch-high, eight-pound portable typewriter (left) while a secretary works an early version of the fax machine (right) Role model: Actress Barbara Hale - best known for her role as legal secretary Della Street on the Perry Mason television series - pictured at her desk However another shows a male executive admiring his scantily clad female assistant as he decides to relocate outdoors as a heatwave hits. According to a study released earlier this year more job descriptions are using the word 'secretary' thanks to Mad Men reigniting the appeal of the role. Ray Weikal, communications specialist at the International Association of Administrative Professionals (IAAP), which conducted the research, noted that for years the term used to describe an administrative assistant had been on the decline, due in part to the feminist movement. He told the Business Insider: 'The title secretary started to go out of fashion after World War II. 'The association was formed as a way of professionalizing secretarial work.  Relocation: A boss and his secretary move their office outside for the day Technological aids: Telephones became increasingly easier to operate over the years and inventions such as the Beoton telephone amplifier allowed office workers to type and make a phone call at the same time Conservative look: Two women opt for more modest attire with button up collars 'The idea was to encourage professional development. After World War II, there was a stigma attached to the title secretary, so many people preferred to be called administrative assistant.' According to Weikal the shift continued with the rise of feminism and women's rights movements, adding: 'With the cultural change of the 1950s through the 1970s, women increasingly wanted to have titles that better reflected their status as fully professional members of their office team.' But now the IAAP reports that in the past two years, the number of workers who have secretary in their job title has almost doubled.  Weikal said experts are deeming it the 'Mad Men' effect as there is no rational data to explain the trend.  In the spotlight: A woman wears a flesh-exposing ensemble as she sets to work at a typewriter Hard at work: Three women cram into a tiny office space Now for the grand finale: Inspirational boss: A picture from 1930 shows Albert Einstein dictating a scientific paper to his conservatively dressed secretary in his attic flat in Berlin __._,_.,_._,___