A system for removable or semi-permanent installation of a transparent organic lighting diode display, and an unlock key card, the system comprising: a transparent organic lighting diode display that includes a transparent organic lighting diode panel with a front side and a back side, a cover glass or a touch sensor coupled to the front side of the transparent organic lighting diode panel, and a transparency control medium coupled to the back side of the transparent organic lighting diode panel to provide transparency control of the transparent organic lighting diode panel, wherein the transparency control medium is an electrochromic glass, a suspended particle device film, or a polymer dispersed liquid crystal film; a versatile hinge assembly coupled to the transparent organic lighting diode display to enable the transparent organic lighting diode display to be mounted to a support structure, characterized in that: the versatile hinge assembly comprises: a mating hinge to be coupled to the support structure; and a mounted hinge base coupled to the transparent organic lighting diode display, wherein the mounted hinge base includes locking spring plungers attached to a first spring, the locking spring plungers include cavities to receive pins, and the locking spring plungers are engageable with the mating hinge to facilitate locking and unlocking of the TOLED display, wherein the mounted hinge base includes engaging spring plungers attached to a second spring, the engaging spring plungers include cavities to receive pins, and the engaging spring plungers are engageable with the mating hinge to couple the mounted hinge base to the mating hinge, wherein the locking spring plungers are disengageable from the mating hinge by the unlock key card, and wherein the pins on the locking spring plungers are engageable with an angled cut-out portion of the unlocking key card to force the pins closer together causing the locking spring plungers to retract and disengage from the mating hinge thereby unlocking the transparent organic lighting diode display to allow the transparent organic lighting diode display to be rotated. a transparent organic lighting diode display that includes a transparent organic lighting diode panel with a front side and a back side, a cover glass or a touch sensor coupled to the front side of the transparent organic lighting diode panel, and a transparency control medium coupled to the back side of the transparent organic lighting diode panel to provide transparency control of the transparent organic lighting diode panel, wherein the transparency control medium is an electrochromic glass, a suspended particle device film, or a polymer dispersed liquid crystal film; a versatile hinge assembly coupled to the transparent organic lighting diode display to enable the transparent organic lighting diode display to be mounted to a support structure, characterized in that: the versatile hinge assembly comprises: a mating hinge to be coupled to the support structure; and a mounted hinge base coupled to the transparent organic lighting diode display, wherein the mounted hinge base includes locking spring plungers attached to a first spring, the locking spring plungers include cavities to receive pins, and the locking spring plungers are engageable with the mating hinge to facilitate locking and unlocking of the TOLED display, wherein the mounted hinge base includes engaging spring plungers attached to a second spring, the engaging spring plungers include cavities to receive pins, and the engaging spring plungers are engageable with the mating hinge to couple the mounted hinge base to the mating hinge, wherein the locking spring plungers are disengageable from the mating hinge by the unlock key card, and wherein the pins on the locking spring plungers are engageable with an angled cut-out portion of the unlocking key card to force the pins closer together causing the locking spring plungers to retract and disengage from the mating hinge thereby unlocking the transparent organic lighting diode display to allow the transparent organic lighting diode display to be rotated. a mating hinge to be coupled to the support structure; and a mounted hinge base coupled to the transparent organic lighting diode display, wherein the mounted hinge base includes locking spring plungers attached to a first spring, the locking spring plungers include cavities to receive pins, and the locking spring plungers are engageable with the mating hinge to facilitate locking and unlocking of the TOLED display, wherein the mounted hinge base includes engaging spring plungers attached to a second spring, the engaging spring plungers include cavities to receive pins, and the engaging spring plungers are engageable with the mating hinge to couple the mounted hinge base to the mating hinge, wherein the locking spring plungers are disengageable from the mating hinge by the unlock key card, and