1 historical cost accounting (hca) is the situation in which accountants record revenue, expenditure and asset acquisition and disposal at historical cost: that is, the actual amounts of money, or money's worth, received or paid to complete the transaction.
2 nature of historical cost accounting this is one of those idiosyncratic headings that teachers dream up (me too, probably!) that meant nothing to me without further explanation
3 the big advantage of hca is that it leads to absolute certainty and it fits in perfectly with the cash flow statement. Hca tells us exactly what has been paid and what has been received and therefore there is no doubt about balance sheet amounts. The alternatives, where accountants attempt to take inflation into account, can lead to many problems. There have been several forms of current cost accounting, purchasing power accounting and so on since the mid 1970s that have been proposed as alternatives to hca. The reason the alternatives have not survived, and IAS 15 on inflation accounting is about to be replaced, if it hasn't been already, is that no one can agree on the best way to represent accounting values. Hca provides definite values, other methods don't!
4 the disadvantages of hca include the fact that hca values can relate to transactions that could be a year old, 10 years old and as much as 100 years old. It's true that some businesses have old equipment and old stocks (inventories) that are still working well but that were bought a long time ago: the problem is that the acquisition value may be out of date and so the balance sheet is showing out of date values. Taxation problems come with inflation accounting. In times of high levels of inflation, profits are inflated and therefore the tax bill tends to increase: this is the reason that inflation accounting was developed in the UK and elsewhere in the 1970s and onwards.