Some calculators even have the ability to do computer algebra.

** Some Hewlett-Packard science / engineering and business / finance calculators

* Some international models of adding machines and printing calculators use the asterisk to denote the total, or the terminal sum or difference of an addition or subtraction sequence, respectively, sometimes on the keyboard where the total key is marked with an asterisk and sometimes a capital T, and on the printout.

Some miniaturized electronics, particularly graphing calculators and hand-held amateur and two-way radio equipment, have serial ports using a jack plug connector, usually the smaller 2. 5 or 3. 5 mm connectors and use the most basic 3-wire interface.

Some years earlier, while researching the introduction to his dissertation, he was looking at the mechanical calculators in the Science Museum, London, United Kingdom, and had realised that the future of calculators lay in electronics.

Some scientific calculators provide a function to convert from rectangular coordinates to polar coordinates.

Some graphing calculators, such as the Casio 9860 series, HP-49 series, TI-89, and TI-Nspire, or the TI-83 Plus / TI-84 Plus with the PrettyPt add-on, can perform pretty-printing.

Some of the more recent graphing calculators are capable of color output, and also feature animated and interactive drawing of math plots ( 2D and 3D ), other figures such as animated Geometry theorems, preparation of documents which can include these plots and drawings, etc.

Some calculator manufacturers also offer computer software for emulating and working with handheld graphing calculators.

Some of the newer calculators are similar, with the addition of more memory, faster processors, and USB connection such as the TI-82, TI-83 series, and TI-84 series.

Some calculators have QWERTY keyboards and others can be attached to an external keyboard which can be close to the size of a regular 102-key computer keyboard.

Some rare mental calculators are autistic savants, with a narrow area of great skill and poor mental development in other directions, but many are people of normal mental development who have simply developed advanced calculating ability.

Some technical handheld calculators use reverse Polish notation in their keyboard interface, instead of having parenthesis keys.

Some of the more notable improvements of the TI-82 over the TI-81 include the following: the addition of a link port to enable programs and other data to be transferred between two calculators or between a calculator and a computer ; the addition of two new graphing types — polar and sequence, the addition of a new type of data — the list, the expansion of the size limit of matrices to 50x50, and the ( unintentional ) addition of the ability to program the calculator in assembly language.

Some of the prominent early applications of CORDIC were in the Convair navigation computers CORDIC I to CORDIC III, the Hewlett-Packard HP-9100 and HP-35 calculators, the Intel 80x87 coprocessor series until Intel 80486, and Motorola 68881.

Some modern tools include but are not limited to overhead projectors, laptop computers, and calculators.

Some alphabets disregard tone entirely, especially when it does not carry a heavy functional load, as in Somali and many other languages of Africa and the Americas.

Some are willing to travel to the other designated areas, especially during slow periods of the day.

Some birds, especially corvids and parrots, are among the most intelligent animal species ; a number of bird species have been observed manufacturing and using tools, and many social species exhibit cultural transmission of knowledge across generations.

Some mathematicians, especially in set theory, do not consider the sets and to be part of the relation, and therefore define a binary relation as being a subset of x, that is, just the graph.

Some carbohydrates ( especially after condensation to oligo-and polysaccharides ) contain less carbon relative to H and O, which still are present in 2: 1 ( H: O ) ratio.

Some biological agents ( especially smallpox, plague, and tularemia ) have the capability of person-to-person transmission via aerosolized respiratory droplets.

Some kinds of raw beans, especially red and kidney beans, contain a harmful toxin ( lectin phytohaemagglutinin ) that must be removed by cooking.

Some constitutions, especially written constitutions, also act as limiters of state power, by establishing lines which a state's rulers cannot cross, such as fundamental rights.

Some are styled " national " banks, such as the National Bank of Ukraine ; but the term " national bank " is more often used by privately owned commercial banks, especially in the United States.

Some calves are ear tagged soon after birth, especially those that are stud cattle in order to correctly identify their dams ( mothers ), or in areas ( such as the EU ) where tagging is a legal requirement for cattle.

Some canid species have also been trapped and hunted for their fur and, especially the gray wolf and the red fox, for sport.

Some of the most elaborate columns in the ancient world were those of the Persians, especially the massive stone columns erected in Persepolis.

Some displays, especially newer LCD monitors, replace the traditional anti-glare matte finish with a glossy one.

Some films also have serious themes, especially on environmental topics and the use of technology.

Some players perform with the sides of one, two, or three fingers, especially for walking basslines and slow tempo ballads, because this is purported to create a stronger and more solid tone.

Some of the main topics of the field are moral responsibility, moral development, moral character ( especially as related to virtue ethics ), altruism, psychological egoism, moral luck, and moral disagreement.

Some roads, especially in the Sinai and southeastern part of the country, are off-limits to foreigners.

Some aficionados who prefer class-A amplifiers also prefer the use of thermionic valve ( or " tube ") designs instead of transistors, especially in Single-ended triode output configurations for several claimed reasons:

Some arthropods however, especially large insects with tracheal respiration, expand their new exoskeleton by swallowing or otherwise taking in air.

Some Directors, especially more established ones, take on many of the roles of a Producer, and the distinction between the two roles is sometimes blurred.

Some authors use, or Cpq, instead of, and, or Epq, instead of, especially in contexts where is used for other purposes.

Some people use oral sex as a means of preserving virginity, especially in the case of adolescent girls who fellate their boyfriends to create and maintain intimacy while preserving their virginity, avoiding pregnancy, or both.

Some people interpret the Bible, especially the New Testament, as teaching belief in, and practice of, faith healing.

Some electrics, especially those with odd-shaped bodies, have one or both strap buttons on the back of the body.

Some predictions of general relativity differ significantly from those of classical physics, especially concerning the passage of time, the geometry of space, the motion of bodies in free fall, and the propagation of light.