Diffference between ALL_TAB_COLS and ALL_COLUMNS

What are difference use between ALL_TAB_COLS and ALL_COLUMNS?

unwilling or incapable to DESCRIBE them yourself?
SQL> desc all_tab_columns
Name                            Null?    Type
OWNER                            NOT NULL VARCHAR2(30)
TABLE_NAME                       NOT NULL VARCHAR2(30)
COLUMN_NAME                       NOT NULL VARCHAR2(30)
DATA_TYPE                             VARCHAR2(106)
DATA_TYPE_MOD                             VARCHAR2(3)
DATA_TYPE_OWNER                        VARCHAR2(30)
DATA_LENGTH                       NOT NULL NUMBER
DATA_PRECISION                         NUMBER
DATA_SCALE                             NUMBER
NULLABLE                             VARCHAR2(1)
COLUMN_ID                             NUMBER
DEFAULT_LENGTH                         NUMBER
DATA_DEFAULT                             LONG
NUM_DISTINCT                             NUMBER
LOW_VALUE                             RAW(32)
HIGH_VALUE                             RAW(32)
DENSITY                             NUMBER
NUM_NULLS                             NUMBER
NUM_BUCKETS                             NUMBER
LAST_ANALYZED                             DATE
SAMPLE_SIZE                             NUMBER
CHARACTER_SET_NAME                        VARCHAR2(44)
CHAR_COL_DECL_LENGTH                        NUMBER
GLOBAL_STATS                             VARCHAR2(3)
USER_STATS                             VARCHAR2(3)
AVG_COL_LEN                             NUMBER
CHAR_LENGTH                             NUMBER
CHAR_USED                             VARCHAR2(1)
V80_FMT_IMAGE                             VARCHAR2(3)
DATA_UPGRADED                             VARCHAR2(3)
HISTOGRAM                             VARCHAR2(15)
SQL> desc all_tab_cols
Name                            Null?    Type
OWNER                            NOT NULL VARCHAR2(30)
TABLE_NAME                       NOT NULL VARCHAR2(30)
COLUMN_NAME                       NOT NULL VARCHAR2(30)
DATA_TYPE                             VARCHAR2(106)
DATA_TYPE_MOD                             VARCHAR2(3)
DATA_TYPE_OWNER                        VARCHAR2(30)
DATA_LENGTH                       NOT NULL NUMBER
DATA_PRECISION                         NUMBER
DATA_SCALE                             NUMBER
NULLABLE                             VARCHAR2(1)
COLUMN_ID                             NUMBER
DEFAULT_LENGTH                         NUMBER
DATA_DEFAULT                             LONG
NUM_DISTINCT                             NUMBER
LOW_VALUE                             RAW(32)
HIGH_VALUE                             RAW(32)
DENSITY                             NUMBER
NUM_NULLS                             NUMBER
NUM_BUCKETS                             NUMBER
LAST_ANALYZED                             DATE
SAMPLE_SIZE                             NUMBER
CHARACTER_SET_NAME                        VARCHAR2(44)
CHAR_COL_DECL_LENGTH                        NUMBER
GLOBAL_STATS                             VARCHAR2(3)
USER_STATS                             VARCHAR2(3)
AVG_COL_LEN                             NUMBER
CHAR_LENGTH                             NUMBER
CHAR_USED                             VARCHAR2(1)
V80_FMT_IMAGE                             VARCHAR2(3)
DATA_UPGRADED                             VARCHAR2(3)
HIDDEN_COLUMN                             VARCHAR2(3)
VIRTUAL_COLUMN                         VARCHAR2(3)
SEGMENT_COLUMN_ID                        NUMBER
INTERNAL_COLUMN_ID                  NOT NULL NUMBER
HISTOGRAM                             VARCHAR2(15)
QUALIFIED_COL_NAME                        VARCHAR2(4000)

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