Bubble memory is a.
Bubble memory is a.
The correct option is A Combination of sequential and direct access devices
Bubble memory is a Combination
of sequential and direct access devices.
Bubble memory is a type of
non-volatile computer memory that uses a thin film of a magnetic material to
hold small magnetized areas, known as bubbles or domains, each storing one bit
of data. The material is arranged to form a series of parallel tracks that the
bubbles can move along under the action of an external magnetic field. The
bubbles are read by moving them to the edge of the material where they can be
read by a conventional magnetic pickup, and then rewritten on the far edge to
keep the memory cycling through the material. In operation, bubble memories are
similar to delay line memory systems.
Bubble memory started out
as a promising technology in the 1980s, offering memory density of a similar
order to hard drives but performance more comparable to core memory while
lacking any moving parts. This led many to consider it a contender for a
"universal memory" that could be used for all storage needs. The
introduction of dramatically faster semiconductor memory chips pushed bubble
into the slow end of the scale, and equally dramatic improvements in hard drive
capacity made it uncompetitive in price terms. Bubble memory was used for
some time in the 1970s and 80s where its non-moving nature was desirable for
maintenance or shock-proofing reasons.
Bubble memory is a Combination of sequential and direct access devices.
Bubble memory is a type of non-volatile computer memory that uses a thin film of a magnetic material to hold small magnetized areas, known as bubbles or domains, each storing one bit of data. The material is arranged to form a series of parallel tracks that the bubbles can move along under the action of an external magnetic field. The bubbles are read by moving them to the edge of the material where they can be read by a conventional magnetic pickup, and then rewritten on the far edge to keep the memory cycling through the material. In operation, bubble memories are similar to delay line memory systems.
Bubble memory started out as a promising technology in the 1980s, offering memory density of a similar order to hard drives but performance more comparable to core memory while lacking any moving parts. This led many to consider it a contender for a "universal memory" that could be used for all storage needs. The introduction of dramatically faster semiconductor memory chips pushed bubble into the slow end of the scale, and equally dramatic improvements in hard drive capacity made it uncompetitive in price terms. Bubble memory was used for some time in the 1970s and 80s where its non-moving nature was desirable for maintenance or shock-proofing reasons.
