Problem: European art music is largely distinguished from many other non-European and popular musical forms by its system of staff notation, in use since about the 16th century. Western staff notation is used by composers to prescribe to the performer the pitches (e.g., melodies, basslines and/or chords), tempo, meter and rhythms for a piece of music. This leaves less room for practices such as improvisation and ad libitum ornamentation, which are frequently heard in non-European art music and in popular music styles such as jazz and blues. Another difference is that whereas most popular styles lend themselves to the song form, classical music has been noted for its development of highly sophisticated forms of instrumental music such as the concerto, symphony, sonata, and mixed vocal and instrumental styles such as opera which, since they are written down, can attain a high level of complexity.
How long has the system of staff notation been in use?
The answer is the following: since about the 16th century

Problem: Hot adult contemporary radio stations play a variety of classic hits and contemporary mainstream music aimed at an adult audience. Some Hot AC stations concentrate slightly more on pop music and alternative rock to target the Generation Z audience, though they include the more youth-oriented teen pop, urban and rhythmic dance tracks.
Along with classic hits, what type of music do hot adult contemporary stations feature?
The answer is the following: contemporary mainstream music

Problem: Airlift is "operations to transport and deliver forces and materiel through the air in support of strategic, operational, or tactical objectives" (AFDD 317, Air Mobility Operations). The rapid and flexible options afforded by airlift allow military forces and national leaders the ability to respond and operate in a variety of situations and time frames. The global reach capability of airlift provides the ability to apply US power worldwide by delivering forces to crisis locations. It serves as a US presence that demonstrates resolve and compassion in humanitarian crisis.
What is the definition of Airlift according to the Air Mobility Operations?
The answer is the following: operations to transport and deliver forces and materiel through the air

Problem: Many assembled PCBs are static sensitive, and therefore must be placed in antistatic bags during transport. When handling these boards, the user must be grounded (earthed). Improper handling techniques might transmit an accumulated static charge through the board, damaging or destroying components. Even bare boards are sometimes static sensitive. Traces have become so fine that it's quite possible to blow an etch off the board (or change its characteristics) with a static charge. This is especially true on non-traditional PCBs such as MCMs and microwave PCBs.
What special protection are most PCBs shipped in?
The answer is the following:
antistatic bags